which cell organelle is responsible for a child having treacher-collins
Answers
Answer:
A change in the gene TCOF1 causes up to 93 per cent of cases of Treacher Collins syndrome. This gene, located on chromosome 5, is responsible for facial development.
Related Questions
How much urine is produced by the kidneys each day?.
Answers
Answer:
Every day, your kidneys filter about 120 to 150 quarts of blood to remove wastes and balance fluids. This process produces about 1 to 2 quarts of urine per day.
(03.04 MC)
If an individual is trisomic for chromosome 21, resulting in Down syndrome, and has an extra chromosome in each cell, what
mutation must have occurred?
OA nondisjunction mutation in the gamete of one of the parents.
Answers
If an individual has trisomy of chromosome 21, resulting in Down syndrome and has an extra chromosome in each cell, the mutation must have occurred is the nondisjunction mutation in the gamete of one of the parents. Thus, the correct option is A.
What is Down syndrome?Down syndrome is the genetic disorder which is caused when there is an abnormal cell division which leads to extra genetic material that an extra chromosome in one of the daughter cells. This occurs because of the nondisjunction mutation in the gamete of one of the parents.
The effects of Down syndrome include disability in intellectual, developmental delays, a distinct facial appearance, low muscle tone, short stature, a flat nasal bridge, and a protruding tongue.
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
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
Answer:
A: A nondisjunction mutation in the gamete of one of the parents
Explanation:
got it right
3. Chickens have 78 chromsomes in their body cells. Compare the amount of genetic material and the number of chromosomes in a chicken skin cell in a) early interphase, b) late interphase, c) metaphase, d) anaphase, and e) after cytokinesis.
Answers
If chickens have 78 chromosomes in their body cells, then the number of chromosomes in a skin cell is 78 in early interphase (diploid), 156 in late interphase (tetraploid) 156 in metaphase (tetraploid), 156 in anaphase (tetraploid) and 78 after cytokinesis (diploid).
What is a diploid cell?A diploid cell is a cell having two complete sets of homologous chromosomes, i.e. two haploid sets of chromosomes, which occur in a somatic mitotic cell in many organisms. During the interphase, the diploid set of chromosomes is duplicated.
Therefore, with this data, we can see that the cell changes the amount of DNA and set of homologous chromosomes during the cell cycle.
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The first step in identifying an organism from a pure working culture is to perform a(n) __________ test.
Answers
Answer:the answer is gram stain.
how does the change in temperature affect pepsin?
Answers
Answer
When testing the effect of temperature on pepsin enzyme activity, the results showed that pepsin worked best at the temperature 30 °C. When the temperature decreased to 22 °C, the enzyme activity decreased sharply. Turbot and redfish retained almost half of the activity at low temperatures (5 °C).
1. what is an organelle?
2. give me an example of an organelle.
3. Which organelle is the "command center" of
the center?
Answers
Answer:
1. a subcellular structure that has a job to do within the cell
2. mitochondria
3. the nucleus
in this server only few peoples r active
.
.
due to night???
Answers
Yeah its night time, most people aren't active at the moment.
Answer:
What’s the question?..
Explanation:
1. Describe one way that a glowing abdomen helps the glow-worm increase its
reproductive success.
Answers
Explanation:
The glow-worm begins its life in the autumn as a pale yellow egg. The freshly laid egg is extremely fragile but within a day its surface has hardened into a shell.
The glow worms use their glowing abdomen to attract male worms in order to mate thus, increasing the rate of reproduction.
What are glow worms?"Glow-worm is the collective name given to female insects that glow because of bioluminescence."These are segmented insects having more than 2 pair of legs and are similar (look wise) to that of caterpillar.During mating season, they lay down on their back, abdomen facing upwards which glow and attracts/lures the male species.The females does not live much after giving birth to their eggs.What is reproduction?"The process by which an organisms give rise to their young ones is called reproduction."Hence, glowing abdomen helps glow-worms to lure male worms which is responsible for reproductive success.
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Look at the branching tree diagram below. (5 points)
A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right with the following traits Four limbs, Amniotic egg, Fur, Shearing teeth, and Retractable claws. There is one vertical line between each of the consecutive five dots. The lines are labeled from left to right as Amphibians, Reptiles, Marsupials, Dogs, Cats.
Which group of organisms evolved after dogs?
Only cats
Only marsupials
Answers
Answer:
Reptiles, marsupials, dogs, and cats
Explanation:
I took the test and got it right
An injury to which region would interfere with the sleep-wake cycle?
Answers
Which of the following would be most likely to provide nitrogen to enrich the soil in which it is grown?
corn
wheat
soybeans
cabbage
Answers
Corn is known to remove approximately 1 pound of nitrogen for every bushel of grain produced.
True or false: autosomes are sex chromosomes
Answers
Answer:
True is your answer
Explanation:
An autosome is any of the numbered chromosomes, as opposed to the sex chromosomes. Humans have 22 pairs of autosomes and one pair of sex chromosomes (the X and Y). ... That is, Chromosome 1 has approximately 2,800 genes, while chromosome 22 has approximately 750 genes
Answer:
Its true!
Explaination:
Grades People Pages Files BigBlueButton Literally translates to "country behind"; typically a service area O Hinterland O Landfill. O Woodland
Answers
"Hinterland" is the correct literal translation for the term. It refers to a service area or a region located behind or beyond a more developed or urbanized area.
The term "hinterland" originates from the German language, where "hinter" means "behind" and "land" means "country" or "land." The literal translation of "hinterland" is indeed "country behind." However, in practical usage, "hinterland" refers to a specific concept rather than simply meaning "country behind."
In common usage, "hinterland" refers to a region or area that is located behind or beyond a more developed or urbanized area. It typically describes a less populated, rural, or less economically developed region surrounding a major city or coastal area. The hinterland serves as a service area or a source of resources for the more developed urban center.
The term can be applied in various contexts, such as transportation and logistics, where the hinterland represents the area served by a particular port, airport, or transportation hub. It can also be used in economic and geographical discussions to describe the relationship between a city and its surrounding region.
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the cup-shaped end of a renal tubule containing a glomerulus is known as
Answers
The cup-shaped end of a renal tubule containing a glomerulus is known as the renal corpuscle, or Bowman's capsule.
The kidneys are a pair of bean-shaped organs located in the back of the abdomen that plays a crucial role in maintaining homeostasis in the body. The functional unit of the kidney is the nephron, which is responsible for filtering and processing blood to remove waste products and excess fluids from the body. The nephron is composed of several structures, including the Bowman's capsule, the glomerulus, and the renal tubule.
The glomerulus is a specialized structure consisting of a cluster of blood vessels, which is responsible for filtering blood as it passes through the nephron. The blood vessels are surrounded by a cup-shaped structure called the Bowman's capsule, which captures the filtrate produced by the glomerulus and directs it into the renal tubule.
The renal tubule is a long, convoluted structure that is responsible for processing and modifying the filtrate as it passes through the nephron. The proximal convoluted tubule is the first segment of the renal tubule, where most of the processing and modification of the filtrate occurs. From there, the filtrate passes through the loop of Henle and the distal convoluted tubule before being directed into the collecting duct and eventually exiting the kidney as urine.
Overall, the Bowman's capsule plays a crucial role in capturing the filtrate produced by the glomerulus and directing it into the renal tubule for further processing and modification. The glomerulus and the Bowman's capsule together form the renal corpuscle, which is the first part of the nephron that filters blood and produces the filtrate that is processed by the rest of the nephron.
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please helppp this is science about plate boundaries thankyousomuch
Answers
Answer:
F
Explanation:
Which of the following should you do to protect yourself from infection if you're taking care of someone who has the flu?
A Give the infected person a few liquids.
B Disinfect objects the infected person has touched.
C Give the infected person a vaccine.
D Take the infected person to a crowded place.
Answers
Disinfect objects the infected person has touched.
What should you do if you've been exposed to the flu?Most physicians also wait until the flu symptoms manifest before prescribing medication. Within 24 hours of exposure, contact your doctor if your child is at high risk. If an antiviral is required, your doctor will make that decision. Those at high risk who have recently had close contact should also consult their physician.
How should a person with a fever be treated?Relax and replenish your hydration intake. No medication is required. If you get a strong headache, stiff neck, shortness of breath, or any other unusual signs or symptoms in addition to the temperature, call your doctor right once. Use acetaminophen (Tylenol, other), ibuprofen (Advil, Motrin IB, other), or aspirin if you're feeling uncomfortable.
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A tetrahedral die is an equilateral triangular pyramid. The base edge of the tetrahedral die is 26 millimeters and the height is 20 millimeters.
What is the surface area of the tetrahedral die to the nearest ten square millimeters?
Answers
A tetrahedral die is an equilateral triangular pyramid with the base edge of the tetrahedral die is 26 millimeters and the height is 20 millimeters has the surface area of the tetrahedral die is approximately 1350 square millimeters to the nearest ten square millimeters.
A tetrahedral die is an equilateral triangular pyramid. The base edge of the tetrahedral die is 26 millimeters and the height is 20 millimeters. What is the surface area of the tetrahedral die to the nearest ten square millimeters?Surface area of tetrahedral dieTo find the surface area of the tetrahedral die, we need to first calculate the area of the triangular faces and then add them up.
The surface area of a tetrahedral die can be calculated as follows:Surface area of a tetrahedral die = Sum of the areas of all its triangular faces.Area of an equilateral triangle. A tetrahedral die is an equilateral triangular pyramid. An equilateral triangle is a triangle where all its sides and angles are equal. The area of an equilateral triangle is given by the formula:Area of an equilateral triangle = (√3/4) * a² where a is the length of each side of the equilateral triangle. Substituting a = 26mm,Area of the equilateral triangle = (√3/4) * 26²= 338 mm².
The tetrahedral die has four equilateral triangular faces. So, its surface area can be calculated by adding the area of each triangular face. Therefore,Surface area of the tetrahedral die = 4 × area of the equilateral triangle= 4 × 338= 1352 mm²= 1.4 × 10³ mm²Therefore, the surface area of the tetrahedral die is approximately 1350 square millimeters to the nearest ten square millimeters.
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how many gametes will be made from this genotype (AaBbCCDdEEFf)?
Answers
\({\fcolorbox{blue}{yellow} {64 possible gametes} }\)
Explanation:To determine the number of gametes that can be produced from an individual with a given genotype, you need to calculate the total number of possible combinations of alleles that can be produced during meiosis.For the genotype AaBbCCDdEEFf, there are six different gene loci, each with two possible alleles. Therefore, the total number of possible gametes can be calculated as follows:2⁶ = 64 possible gametesSo, an individual with the genotype AaBbCCDdEEFf can potentially produce 64 different gametes through meiosis2)
«ՈՒՐԱՐ,
A
B
C
Which of the molecules above is a tRNA molecule?
none of the above.
A
Ծ Ծ Ծ Ծ
C
B
Answers
Answer:
B
Explanation:
Transfer RNA (tRNA) is an RNA molecule involved in the process of translation by which cells synthesize proteins. These molecules (tRNAs) have 76-90 nucleotides in length which form characteristic stem-loop structures, and they are considered adaptor molecules because tRNAs serve as the physical link between the messenger RNA (mRNA) and specific amino acid residues of the growing polypeptide chain. A tRNA is composed of a trinucleotide region (i.e., the anticodon region) that binds to the codon in the mRNA, and a region that attaches to a specific amino acid in order to transfer it to the ribosome, where protein synthesis takes place.
Answer:
b
Explanation:
edge,,Ծ‸Ծ,,
"What does the abbreviation, HTLV I, stand
for?
Answers
This abbreviation can be used in the Human T-lymphotropic virus type I. This article can explain the virus in detail, how it affects the body, its transmission, and other important aspects of the virus.
HTLV I stands for Human T-lymphotropic virus type I. It is a retrovirus that belongs to the family of human retroviruses. The virus is known to infect T cells. It is transmitted through contact with blood, semen, vaginal fluids, and breast milk. The virus is known to be endemic in some regions of the world, including parts of Japan, the Caribbean, and Central and South America.This abbreviation can be used in the Human T-lymphotropic virus type I. This article can explain the virus in detail, how it affects the body, its transmission, and other important aspects of the virus.
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A cold pack is snapped, and the chemical reaction causes the pack to feel cold. Which kind of reaction is this?
A.) This is an endothermic reaction because the surroundings took energy from the system.
B.) This is an exothermic reaction because the system took energy from the surroundings.
C.) This is an endothermic reaction because the system took energy from the surroundings.
D.) This is an exothermic reaction because the surroundings took energy from the system.
Help!!!
Answers
Answer:
here are the answers
the change in energy in a system during an exothermic reaction
In the air, only the oxygen is part of the system.
The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings
This is an endothermic reaction because the system took energy from the surroundings.
Energy is released by the formation of chemical bonds, and energy is absorbed when the bonds are broken.
heparin is a naturally occuring anticoagulant produced by
Answers
Heparin is a naturally occurring glycosaminoglycan produced in the body by basophils and mast cells
utero-, metro- and hystero- (uter/al; endo/metr/itis; hyster/ectomy) mean:
Answers
The prefixes "utero-", "metro-", and "hystero-" are derived from Greek and are commonly used in medical terminology to refer to different aspects related to the uterus. Here's what each prefix signifies:
1. Utero-: The prefix "utero-" refers to the uterus, which is a female reproductive organ where fetal development takes place during pregnancy. For example, "uterine" refers to anything related to the uterus, such as the uterine lining or uterine contractions.
2. Metro-: The prefix "metro-" also pertains to the uterus. It specifically relates to the inner lining or endometrium of the uterus. For instance, "endometritis" is the inflammation of the endometrium, the inner lining of the uterus.
3. Hystero-: The prefix "hystero-" is synonymous with "utero-" and refers to the uterus as well. It is commonly used in medical terms to denote procedures or conditions related to the uterus. For example, "hysterectomy" is the surgical removal of the uterus.
These prefixes help in constructing medical terms and indicate the involvement of the uterus or its various components in different medical conditions, procedures, or anatomical descriptions.
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invaginations of the muscle cell membrane that extend deep into the cell are known as the
Answers
Invaginations of the muscle cell membrane extending deep into the cell are known as the transverse (T) tubules.
The invaginations you're referring to are known as transverse (T) tubules. T tubules are tube-like structures that extend from the muscle cell membrane, also called the sarcolemma, deep into the muscle cell.
They play a crucial role in the excitation-contraction coupling process, which is necessary for muscle contraction. By spreading the electrical signal throughout the muscle cell, T tubules ensure that the entire cell contracts uniformly.
This coordinated contraction is essential for muscles to generate force and carry out their functions in the body.
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¿Cómo modificó la biodiversidad la aparición de los
metabolismos fotoautótrofos?
Answers
La biodiversidad es esencial para la vida y los seres humanos dependen de ella. Nosotros utilizamos elementos de la biodiversidad en nuestra vida diaria para la alimentación, medicina y construcción, entre otros.
Which of the following statements about Cnidarians and Ctenophores are accurate? (Select all that apply) Ctenophores are filter feeders whereas cnidarians are carnivores Cnidarians have an incomplete digestive system whereas ctenophores have a complete digestive system Both cnidarians and ctenophores produce and utilize cnidocytes for prey capture Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions A hydra or sea anemone displays the body form whereas a jellyfish displays the body form. polyp/ medusa Omedusa/ polyp O polyp/ polyp medusa/ medusa What are the cnidocytes? specialized flagellated cells for water movement through the cnidarian body specialized ciliated cells that help the animal swim specialized adhesive cells used in feeding specialized cells with threadlike filaments that function in prey capture and defense specialized excretory cells for waste removal
Answers
The correct statements are:Ctenophores are filter feeders whereas cnidarians are carnivores.Cnidarians and Ctenophores are two phyla of animals in the Kingdom Animalia that exhibit significant diversity in form and lifestyle.
Cnidarians and Ctenophores both produce and use cnidocytes for prey capture. Cnidocytes are specialized cells with thread-like filaments that function in prey capture and defense.Both cnidarians and ctenophores exhibit two distinct body forms: a polyp and a medusa. A hydra or sea anemone displays the body form whereas a jellyfish displays the medusa body form.
Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions.Cnidarians have an incomplete digestive system, whereas ctenophores have a complete digestive system.
The correct statements are:Ctenophores are filter feeders whereas cnidarians are carnivores.Cnidarians have an incomplete digestive system whereas ctenophores have a complete digestive system.Both cnidarians and ctenophores produce and utilize cnidocytes for prey capture.
Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions.A hydra or sea anemone displays the polyp body form whereas a jellyfish displays the medusa body form.The correct answer is option A, C, D, and E.
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If you lose an object or its focus when changing to higher magnifications what should you do? 6. What happens to the size of the field of view when magnification is increased? What happens to the amount of light necessary to view the object
Answers
5. If you lose an object or its focus when changing to higher magnifications, there are a few steps you can take:
RefocusLower the stageReduce the magnification6. When the magnification is increased, the size of the field of view typically decreases.
7. Increasing the magnification doesn't directly affect the amount of light necessary to view the object.
Refocus: Try adjusting the focus using the focus knob or wheel on your microscope. Sometimes, changing the magnification requires slight adjustments to the focus to maintain clarity.Lower the stage: If the object is completely out of view, lower the stage or move it upwards using the coarse adjustment knob. This will bring the object closer to the lens, making it easier to locate.Reduce the magnification: If you're unable to locate the object at higher magnifications, switch back to a lower magnification level. This will provide a wider field of view, making it easier to find the object. Once you have located it, you can increase the magnification gradually.When the magnification is increased, the size of the field of view typically decreases. Higher magnifications allow you to see smaller details but with a narrower field of view. This means that you can observe a smaller portion of the specimen at higher magnifications compared to lower magnifications.
As for the amount of light necessary to view the object:
Increasing the magnification doesn't directly affect the amount of light necessary to view the object. However, higher magnifications can make the image appear dimmer due to the reduced amount of light passing through the narrower field of view.
To compensate for this, you may need to adjust the lighting conditions, such as increasing the intensity of the light source or adjusting the diaphragm or iris control on the microscope to allow more light to pass through. Proper lighting is important for obtaining a clear and well-illuminated image at higher magnifications.
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Is school important? Yes or No? Worth 40 points
Answers
Answer:
Yes
Explanation:
Provides Stability. Education provides stability in life, and it's something that no one can ever take away from you. By being well-educated and holding a college degree, you increase your chances for better career opportunities and open up new doors for yourself!
:)
Choose the incorrect statement from the following sentences. i.Chlorenchyma is specialized parenchyma that has chlorophyll pigment. ii.Apical meristem is responsible for growth of plants at root and shoot tips. iii.Parenchyma has thick cell wall and prominent nuclei. iv.Sclerenchyma gives stiffness and hardness to plants.
Answers
the third statement is wrong. Parenchymal cells have thin walls and the nuclei are not visible.
A parenchyma has the opposite of thick walls (thin walls). And the nuclei are not prominent, they are invisible to the eye.
You decide to study which dishwashing
detergent removes dried on ketchup
the fastest. Which of these would be
considered a constant in the
experiment?
A. Using different brands of dish detergent
B. Using different amounts of ketchup
Answers
Answer: Using 40° C water
Explanation:
One decides to study which dishwashing detergent removes dried ketchup the fastest, so one would be considering using different brands of dish detergent , which is in option A. Hence, option A is correct option.
In a scientific experiment, a constant is a factor that remains the same throughout the experiment. It is essential to keep certain variables constant to ensure that any observed changes or effects can be attributed to the specific variable being tested. By doing so, it helps eliminate potential confounding factors that could interfere with the results. In the given scenario, the aim is to study which dishwashing detergent removes dried on ketchup the fastest. The variable being tested is the dishwashing detergent. Therefore, the constant in the experiment should be something that remains consistent throughout all trials. Hence, option A is correct option.
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