quizlet an allele at gene m prevents expression of the alleles at gene r. which term describes this relationship?
Answers
The term that describes the relationship where an allele at gene m prevents the expression of the alleles at gene r is epistasis.
Epistasis is a type of gene interaction where the expression of one gene is influenced by the expression of another gene. This means that the presence of one gene affects the way another gene is expressed. In the scenario given, the allele at gene m is preventing the expression of the alleles at gene r, which means that the presence of the m allele is inhibiting the expression of the r alleles.
To understand how this works, it is important to know that genes contain the instructions that code for proteins, and the expression of genes results in the production of specific proteins. In this case, the protein produced by gene m is preventing the expression of the proteins produced by gene r. This could happen because the protein produced by gene m interacts with the proteins produced by gene r in such a way that they cannot function properly, or because the protein produced by gene m blocks the production of the proteins produced by gene r.
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The term that describes the relationship between an allele at gene m that prevents the expression of the alleles at gene r is called epistasis.
Epistasis is a type of genetic interaction in which one gene prevents or masks the expression of another gene. In other words, it is a phenomenon in which the expression of one gene depends on the expression of another gene. The gene that suppresses or masks the expression of another gene is known as an epistatic gene, and the gene whose expression is suppressed or masked is known as a hypostatic gene. In the given scenario, the allele at gene m is the epistatic gene, and the alleles at gene r are hypostatic genes. The allele at gene m masks the expression of the alleles at gene r, preventing them from being expressed. Therefore, the relationship between the allele at gene m and the allele at gene r is called epistasis.
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Related Questions
If an individual has trisomy resulting in Down syndrome and has an extra chromosome in each cell, what mutation must have occurred?
A. A nondisjunction mutation in the gamete of one of the parents
B. A nondisjunction in both gametes of the parents
C. A nondisjunction in one of the first gamete cells of the individual
D. A nondisjunction mutation in body cells of both parents
Answers
Answer:
if An individual has an extra chromosome in every one of its cells, the mutation that must have occurred is A non-disjunction mutation in the gamete of one of the parents
If an individual has trisomy resulting in Down syndrome and has an extra chromosome in each cell, the mutation that must have occurred is A. A nondisjunction mutation in the gamete of one of the parents.
Down syndrome simply means a genetic disorder that is caused when there's an abnormal cell division that then leads to extra genetic material.
The effect of Down syndrome is the fact that it leads to an intellectual disability, developmental delays, and a distinct facial appearance.
The mutation that has occurred with someone that has a Down syndrome is the nondisjunction mutation in the gamete of one of the parents.
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Which hand hygiene method kills biological agents more effectively when hands are not visibly dirty?
Answers
Unless hands are obviously filthy (e.g., dirt, blood, bodily fluids), an Alcohol-based handrubs massage is favored over soap and water in most clinical contexts because it: kills potentially lethal bacteria on hands more effectively than soap.
Alcohol-based handrubs are efficient in eliminating the non-spore form of Clostridium difficile that may be present. As a result, using appropriate gloves and practicing hand hygiene on non-soiled hands will ensure clean, safe hands.
Alcohol-based handrubs have numerous advantages over soap and water hand washing: they take less time.The interphase phase of the cell cycle is where the majority of the life of a normal cell occurs. Interphase is the cell's "everyday life" or metabolic phase, during which it receives and metabolize. Hand cleaning with soap and water is more effective.
Alcohol-based handrubs show powerful antimicrobial efficacy against enveloped viruses and great antibacterial properties against gram-positive and gram-negative vegetative bacteria.
Alcohol-based hand rubs (ABHRs) are an efficient way to reduce bacterial infection transmission.
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Environmental constraints are changed when an individual's body grows and matures, leading to further development of the skeletal, muscular, and nervous systems.
a. true
b. false
Answers
Environmental constraints refer to external factors or influences that affect an individual's development, such as nutrition, exposure to toxins, and social interactions. The statement is false.
Environmental factors certainly play a role in influencing overall development, but they do not directly change the constraints or mechanisms involved in the growth and maturation of these systems. Instead, environmental factors can indirectly impact development by affecting factors like nutrition, physical activity, exposure to toxins, or stress, which can have consequences on the development of the skeletal, muscular, and nervous systems.
These constraints do not change as an individual's body grows and matures. However, the growth and maturation of the skeletal, muscular, and nervous systems are primarily determined by genetic factors and internal biological processes, rather than changes in environmental constraints.
Therefore, the statement is false.
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Which of the following is(are) true about ribosomes? Select all that apply. WILL GIVE BRAINLIEST!!!!
1. They are found on the surface of the smooth endoplasmic reticulum.
2. They are found free floating in the cytoplasm.
3. They are the site of production of carbohydrates.
4. They are the site of protein synthesis.
Answers
Answer:
4) They are the site of protein synthesis
Explanation:
in the frog, which two accessory digestive organs release compounds into the duodenum (first part of the small intestine) through the bile duct?
Answers
In the frog, the two accessory digestive organs that release compounds into the duodenum through the bile duct are the liver and the pancreas.
The liver produces bile, which is stored in the gallbladder and released into the duodenum through the bile duct.
The pancreas also releases digestive enzymes into the duodenum through the bile duct. These enzymes include lipases for fat digestion, amylases for carbohydrate digestion, and proteases for protein digestion.
Together, the liver and pancreas release compounds into the duodenum through the bile duct, contributing to the efficient digestion and absorption of nutrients in the small intestine.
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research studies show that the population of black-footed ferret is about 1,000. biologists are worried that these species are on the verge of extinction. which act can protect these species and who manages this act?
Answers
Species at Risk, Fish & Wildlife Richer investigations have revealed that the number of black footed
An animal or plant species that has an extremely low population and is in immediate risk of going extinct is referred to as an endangered specie. The Us Fish and Wildlife services often oversee such plants and animals in the United States of America. This government organization is in charge of managing various wildlife species, fisheries, and natural environments in the US Species.
A US legislation known as the Endangered Species Act lays out guidelines for managing both plants and species that are thought to be in risk of going extinct. The law contains provisions for the protection of vulnerable living things.
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What type of scientist would be the best qualified to perform genetic engineering to pro- duce seed that are more productive in agriculture? A. biochemist B. geologist C. molecular biologist D. paleontologist
Answers
The type of scientist best qualified to perform genetic engineering to produce more productive seeds in agriculture would be a molecular biologist, the correct option is C.
Molecular biologists specialize in studying the structure, function, and interactions of molecules within biological systems, including DNA and genes. Genetic engineering involves manipulating the genetic material of organisms, which requires a deep understanding of molecular biology principles.
Molecular biologists have the expertise to identify and isolate specific genes responsible for desired traits in crop plants, such as increased productivity or resistance to pests or diseases. They can then modify or introduce these genes into target plants to achieve the desired outcomes, the correct option is C.
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how many radioactive probes were used in this activity?
Answers
The number of radioactive probes used in an activity depends on several factors, including the experimental design, the number of target sequences being investigated, and the specific methodology employed.
In the context of the given activity, the specific number of radioactive probes used is not mentioned. Therefore, without additional information, it is not possible to provide an accurate count of the radioactive probes used.
However, it's important to note that radioactive probes are commonly employed in various molecular biology techniques for detecting and studying specific nucleic acid sequences.
These probes are typically labeled with a radioactive isotope, such as phosphorus-32 or iodine-125, which emits radiation that can be detected using specialized equipment like autoradiography or a scintillation counter.
For instance, techniques like Northern blotting, Southern blotting, or in situ hybridization often involve the use of a single radioactive probe. On the other hand, techniques like DNA microarrays or RNA sequencing may involve the use of multiple probes simultaneously to detect a range of target sequences.
Therefore, without further information about the specific experimental setup or technique being referred to, it is not possible to provide an accurate count of the radioactive probes used in the activity.
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Why is a control group important in a scientific experiment
Answers
Answer:
It is important to have a control substance so that you can clearly confirm that whatever you're experimenting with is what is causing the reaction. That's why it is good to have 2. One doesnt get experimented with and the other does.
Explanation:
Which phrase best describes an individual organ?
A. Made of one kind of cell
B. Made of different kinds of tissues
C. Meets all the needs of an organism
D. The simplest unit of life
SUBM
Answers
Answer:
B. Made of different kinds of tissues
Explanation:
Order the events to describe ionic compound formation
Attraction of oppositely charged ions
Formation of ions
Transfer of electrons from metal to nonmetal
Answers
Answer:
Transfer of electrons from metal to nonmetal, Formation of ions, Attraction of oppositely charged ions.
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the population projection technique that allocates a projected population expansion to subregional areas is called:
Answers
The population projection technique that allocates a projected population expansion to subregional areas is called shift share approach.
What is population?
A community's inhabitants who belong to the same species. A population's makeup is influenced by things like density, sex ratios, birth and death rates, immigration, and emigration.
What is sub region?
A biogeographic region's major division. subregional.
Therefore, the population projection technique that allocates a projected population expansion to subregional areas is called shift share approach.
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What is the function in a cell of the carbon compounds nucleic acids?
provides a cell membrane that regulates the interaction between the cell and the environment
stores and transmits hereditary information
stores energy for the cell and sometimes provides structural support
regulates cell processes, transports things into and out of the cell, and fights disease
Answers
The function of the cell of the carbon compounds nucleic acid is it regulates cell processes, transports things into and out of the cell, and fights disease.
What are the functions of nucleic acids?Nucleic acids are biopolymers, macromolecules, essential to all known forms of life. They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous base.
Nucleic acids are large biomolecules that play essential roles in all cells and viruses. A major function of nucleic acids involves the storage and expression of genomic information. Deoxyribonucleic acid, or DNA, encodes the information cells need to make proteins.
Nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), carry genetic information which is read in cells to make the RNA and proteins by which living things function.
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What surprised you about the anatomy of the sheep’s heart
Answers
The anatomy of the sheep and human hearts is comparable. It has four chambers with direct connections between the mitral and tricuspid valves.
The sheep heart is a great model for comparing the size and operation of human organs. The sheep heart is mammalian and has four chambers, including two atria and two ventricles, just like the human heart.
The human heart pumps blood from its right side to the lungs, then from its left side to the body. The blood flow through the sheep heart is similar to that of the human heart.
Orientation of the heart:The left ventricle exhibits more resistance when squeezed because the wall (muscle) is significantly thicker.
The anterior interventricular sulcus runs diagonally to the left while the posterior interventricular sulcus goes more vertically.
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If a cell's lysosomes were damaged, which of the following would most likely occur?
A: The cell would be less able to regulate the amount of fluid in its cytoplasm
B: The cell would be less able to break down molecules in its cytoplasm
C: The cell would have chloroplasts that appear yellow rather than green
D:The cell would produce more proteins than it needs
Answers
Answer:
interpret the function and interrelation of the brain and the nerves system
Heparin is a complex polysaccharide, a component of proteoglycans. Isolated heparin used as an anticoagulant, binds to the protein antithrombin and inhibits clot formation. As lipoprotein lipase is bound to the capillary endothelium
through proteoglycan, heparin also can bind to LP lipase and dislodge it from the
capillary wall. Why such treatment results in increased levels of triacylglycerols
in blood? For the answer:
a) draw the scheme representing the function of LP — lipase;
b) indicate the activator of this enzyme;
c) explain the mechanism of hypertriacylglycerolemia development in the
patient.
Give detailed answer
Answers
Treatment with heparin can lead to increased levels of triacylglycerols in the blood due to the effect it has on lipoprotein lipase (LP lipase).
a) The function of LP lipase is to break down triacylglycerols into free fatty acids and glycerol, which can then be taken up by cells and used for energy or storage. LP lipase is attached to the capillary endothelium through proteoglycans.
b) The activator of LP lipase is apolipoprotein C-II (apoC-II), which is found on the surface of chylomicrons and very low-density lipoproteins (VLDL).
c) The mechanism of hypertriacylglycerolemia development in patients treated with heparin involves the binding of heparin to LP lipase. Heparin can dislodge LP lipase from the capillary wall, preventing it from effectively breaking down triacylglycerols. This results in an accumulation of triacylglycerols in the blood, leading to increased levels of triacylglycerols.
In summary, heparin treatment can disrupt the function of LP lipase, which is responsible for breaking down triacylglycerols. This disruption leads to increased levels of triacylglycerols in the blood.
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which lobe of your brain are you using when you answer this question?
Answers
Precentral gyrus of the frontal lobe is used when I am answering this question.
Primary motor cortex is located within the precentral gyrus. They are generally responsible for the control of voluntary movement that are motor in nature. As the precentral gyrus is the location of the primary motor cortex, several motor pathways originate within it. The dysfunction of the precentral gyrus plays a role in the when the voluntary movements are impaired and they are associated with schizophrenia and it has significantly reduced functional activity in patients with schizophrenia. The functional organization of the precentral gyrus is such that clusters of Betz cells are morphologically represented by an inverted homunculus.
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1 Down syndrome is caused by blank in humans
A disomy
B Monosmomy
C tetrasomy
D trisomy
2 karyotyping can used to identify
A Chromosmal abnormalities
B Chormosmal treatments
C cancer
D Genetic sequences
Which controls in the intstructions that affect an organism's characteristics
A the reproduction method of the parents
B the order that nitrogen bases are arranged
C the shape of the dna molecule
D the number of chromosomes
5 what is the most important function of visualizing chromosmes with a karyotype
A chromosome visualization helps scientists identify and compare different organisms
B chromosome visualization helps scientists stain dna molecules
C chromosome visualization helps scientists create packages of dna
D chromosome visualization helps scientists determine how characteristics are coded
Answers
The extra chromosome 21 seldom joins another chromosome. Down syndrome patients' physical characteristics and developmental disabilities are brought on by this additional genetic material.
What do you meant by syndrome ?A kid with Down syndrome typically has an additional copy of chromosome 21; this results in 47 rather than 46 chromosomes. Chromosome 21 is an extra chromosome that seldom joins with another chromosome.Karyotyping is a test performed to determine whether chromosome abnormalities are the root of an illness or deformity. Blood, bone marrow, amniotic fluid, or placental tissue can all be used as test subjects for this procedure.A particular protein, which affects a person's attributes, is mostly regulated by genes. The blueprint for generating a species' traits is contained in its DNA. A living thing's cells all contain the same genetic material, but how those genes are expressed can vary.If you have a complete set of 46 chromosomes, your cells' chromosomes will be examined as part of a karyotype test.To learn more about syndrome refer to :
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PLEASE HELP PLEASE PLEASE PLEASE
Answers
Answer: B
Explanation: This should be the correct answer(: since hereditary means passing genetical material/information from parent to offspring (one gerneration to another)
Explain the various ways in which enzymes can be regulated in the cell. Explain the importance of studying enzyme kinetics. Provide at least one example of an application of enzyme kinetics. Explain how spectrophotometry is used to analyze enzyme kinetics. Why do you need a light-absorbing species for this method to work
Answers
a. The various ways in which enzymes can be regulated in the cell are allosteric control, competitive inhibition, and cooperative binding.
b. The study of enzyme kinetics is important because it enables us to understand how enzymes function. It also helps to determine the rate of enzyme-catalyzed reactions.
c. An example of an application of enzyme kinetics is the production of lactose-free milk.
d. Spectrophotometry is used to analyze enzyme kinetics by measuring the absorbance of light by a sample.
e. A light-absorbing species is needed for this method to work because it provides a way to measure the concentration of the substrate or product.
Enzymes can be regulated in the cell in several ways. Some of the ways in which enzymes can be regulated in the cell are as follows
Allosteric control refers to the regulation of enzymes by the binding of molecules to a site on the enzyme that is not the active site. Allosteric regulators can either inhibit or activate the enzyme.Competitive inhibition: A substrate that is structurally similar to the enzyme’s natural substrate can compete with it for binding at the active site, which reduces the enzyme’s catalytic activity.Cooperative binding: Cooperative binding occurs when the binding of one molecule to the enzyme changes the activity of other active sites on the enzyme.Enzyme kinetics can be used to develop new drugs that target enzymes, study the effects of mutations on enzymes, and optimize conditions for industrial enzyme processes. One example of an application of enzyme kinetics is the production of lactose-free milk. The enzyme lactase breaks down lactose in milk, but some people are lactose intolerant and cannot digest lactose. By using enzyme kinetics, it is possible to optimize the production of lactase and reduce the amount of lactose in milk.
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Select the correct answer.
Jeff is a forensic technician. He is analyzing a hair found at a crime scene. It is blond, but he is not certain if that is the hair's natural color. V
the hair will tell him its natural color?
OA.
cuticle
B. medulla
O C.
cortex
OD. follicle
Answers
Answer:
D .follicle
Explanation:
because those are the structure of the hairs
Answer: Follicle
Explanation:
I took the test (clever)
Explain how fitness can change the allele frequency of a population. PLZ no link
Answers
Answer:
Natural selection can cause microevolution (change in allele frequencies).
Explanation:
With fitness-increasing alleles becoming more common in the population.
Fitness can affect the survival and reproduction rates of individuals with different alleles, leading to differential contribution to the next generation and changes in the frequency of these alleles in the population.
What is fitness?Fitness is a measure of the reproductive success of an individual within a population. The fittest individuals are those that are most successful at passing their genes on to the next generation. When the environment changes, the selective pressures on a population also change. This can lead to changes in the relative fitness of different individuals, and thus changes in the allele frequencies of a population over time.
For example, if a population of birds lives on an island with small seeds, those birds with small beaks may be more fit than those with larger beaks. This is because they are better adapted to the environment and can more easily obtain food. Over time, the frequency of the small-beaked allele will increase in the population, while the frequency of the large-beaked allele will decrease.
Thus, fitness can drive changes in the allele frequency of a population over time by favoring those individuals with alleles that are better adapted to the environment.
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explain the roles of specific hornomones in the menstrual cycle, including positive and negative feedback mechanisms
Answers
Hormones play a significant role in the menstrual cycle. Specific hormones regulate the cycle and make the uterus suitable for implantation and pregnancy. Hormones such as follicle-stimulating hormone (FSH), luteinizing hormone (LH), estrogen, and progesterone perform different functions to ensure the menstrual cycle occurs correctly.
FSH and LH are produced by the anterior pituitary gland in the brain. They stimulate the ovaries to produce estrogen and progesterone.FSH initiates the process of follicular development in the ovaries. The follicles grow and produce estrogen. Estrogen triggers the thickening of the endometrial lining, making it suitable for implantation. As the follicles mature, they produce inhibin, which suppresses the production of FSH by the pituitary gland.LH stimulates ovulation, which is the release of the mature egg from the ovary into the fallopian tube. After ovulation, the remaining follicle transforms into the corpus luteum.
The corpus luteum then produces progesterone. Progesterone continues thickening the endometrial lining, preparing it for implantation. If fertilization doesn't occur, the corpus luteum dies, and progesterone production stops. This causes the endometrial lining to shed, leading to menstruation.Positive and negative feedback mechanisms regulate the menstrual cycle. Positive feedback occurs when a hormone triggers an increase in the production of another hormone. For example, estrogen stimulates the production of LH, which in turn stimulates the production of estrogen. Negative feedback occurs when a hormone inhibits the production of another hormone. For instance, inhibin produced by the mature follicle inhibits the production of FSH by the pituitary gland.
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Match each description to the appropriate tool. measures a variety of data, including pH levels and conductivity measures temperature, humidity, wind speed, and pressure gathers information about local atmospheric conditions can digitally record data, such as flow rate
Answers
Answer:
1. Scientific probe.
2. Weather station.
3. Weather station.
4. Scientific probe.
Explanation:
1. Scientific probe: measures a variety of data, including pH levels and conductivity. Thus, a scientific probe is a device that is typically used for measuring science-based data such as electrical conductivity, pH levels, salinity etc., of various materials.
2. Weather station: measures temperature, humidity, wind speed, and pressure. Basically, a weather station comprises of various devices for measuring atmospheric conditions such as thermometers, barometers, hygrometer, wind vane etc., used for the measurement of temperature, atmospheric pressure, relative humidity and wind speed respectively.
3. Weather station: gathers information about local atmospheric conditions.
4. Scientific probe: can digitally record data, such as flow rate.
Answer:
SCIENTIFIC PROBE
1. measures a variety of data, including pH levels and conductivity
2. can digitally record data, such as flow rate
WEATHER STATION
1. measures temperature, humidity, wind speed, and pressure
2. gathers information about local atmospheric conditions
Explanation:
These are the correct matches for this question, I got it correct on my test
Based on your answer above, do organisms with higher fitness mean that they have survived to an advanced age
Answers
Answer:
yes
Explanation:
I just know the answer
(GIVING BRAINLIEST!!)
Due to altitude, you might find snow here during the summer months.
A) By a lake
B) In the forest
C) In the ocean
D) On a mountain
Answers
Answer:
D
Explanation:
Since the temperature is colder at a higher altitide you can use that knowledge to think about how high these places are relative to eachother. You can then take the highest one for your answer
Higher up it is colder
Which of the following solutions would have solute concentration that is lower than the concentration found inside the cell
Answers
Answer:
hypotonic solution
A hypotonic solution has a lower solute concentration than inside the cell (the prefix hypo is Latin for under or below). The difference in concentration between the compartments causes water to enter the cell.
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Answer:
A. Hypotonic Solution
explain the effect of germination on pea seed respiration
Answers
Answer:
"The affect of germination on the rate of cell respiration in peas is that in peas that are germinated, the rate of cell respiration is higher because the cells are growing/going through mitosis which requires energy/ATP in order to be carried out which is generated through the process of cellular respiration."
(Biology Cell Respiration Lab Flashcards | Quizlet)
GIVE BRAINLIEST PLZ :)
help me please :((((
Answers
Answer:
C) 13
Explanation:
Aluminum is element No. 13 on the Periodic Table of Elements.
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Which is the function of the type of muscle that is pictured below
Support and movement of the skeleton
Movement of food through the digestive system
Contraction and relaxation of the heart
Generation and conduction of electrical signals
Answers
This is is a smooth muscle hence it can perform the function of contraction and relaxation of the heart. (Option C)
What is a smooth muscle?The smooth muscle refers to the muscle that is not under conscious control. They control some involuntary movements such as the beating of the heart and breathing.
Thus muscle that is pictured here is a smooth muscle hence it can perform the function of contraction and relaxation of the heart.
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