in guppies (a common aquarium fish), a narrow tail (t) is recessive to a wide tail (t), and blue stripes (r) are recessive to red stripes (r). these 2 loci are linked and separated by a distance of 12 m.u. a true breeding wide tailed, red striped guppy was crossed with a true breeding narrow tailed, blue striped guppy. an f1 guppy was then crossed to true breeding narrow tailed, blue striped guppy and 100 progeny were produced. how many guppies with wide-tails and blue stripes would you expect to see in these progeny? assume that all genotypes are equally viable (ie. that there is no embryonic lethality that would alter the expected ratios of offspring). question 14 options: 44 6 12 88 25
Answers
In the given scenario, a cross was made between a true breeding wide-tailed, red-striped guppy (TTrr) and a true breeding narrow-tailed, blue-striped guppy (ttRR).
When the true breeding wide-tailed, red-striped guppy (TTrr) is crossed with the true breeding narrow-tailed, blue-striped guppy (ttRR), the resulting F1 generation will be heterozygous for both traits (TtRr). This is because the wide tail trait (T) and the red stripe trait (R) are dominant over the narrow tail trait (t) and the blue stripe trait (r), respectively.
In the subsequent cross between the F1 guppy (TtRr) and the true breeding narrow-tailed, blue-striped guppy (ttRR), the expected phenotypic ratios in the progeny can be determined based on the principles of Mendelian genetics. Since the two loci are linked, we need to consider the distance of 12 m.u. between them.
With the given linkage distance, the expected recombination frequency between the two loci is 12%. This means that 12% of the progeny will exhibit recombination events and have a different combination of traits compared to the parental generation. However, since all genotypes are assumed to be equally viable, the remaining 88% will retain the parental combinations.
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Related Questions
Which of the following is not caused by Mad Cow disease?
spongiform encephalopathy
eventual death
trembling, shaking, and staggering movements
solidified brains
Answers
Answer:
None
Explanation:
They are all symptoms or effects of the disease.
charles darwin described the differences in beak shape of the galapagos finches as being the result of:
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Charles Darwin described the differences in beak shape of the Galapagos finches as being the result of natural selection.
Darwin observed that the finches on each island had adapted their beak shape to suit the particular type of food available on that island. The birds with beaks that were best suited to their environment were more likely to survive and reproduce, passing on their advantageous traits to their offspring.
Over time, this resulted in the development of distinct beak shapes on each island.
This process is an example of adaptive radiation, where a single species gives rise to multiple species that are adapted to different ecological niches. Darwin's observations of the Galapagos finches were a critical part of his theory of evolution by natural selection, which proposes that species change over time as a result of natural processes such as variation, selection, and inheritance.
Today, the Galapagos finches remain a classic example of evolutionary biology and continue to be studied by scientists to better understand the mechanisms of evolution.
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How has organizational system evolved or changed over time and why were the changes made
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why blood flow in a leg vein is slow when there is lack of movement?
Answers
in certain plants, tall is dominant to short. if a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short? in certain plants, tall is dominant to short. if a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short? 1/4 0 1 1/2
Answers
Answer: the offspring will not be short
Explanation: in every possible cross, the offspring has an allele for tall. if a dominant allele is present, the individual will express the dominant trait
Describe and compare the types of scales used by scientists to measure and describe earthquakes.
Please help
Answers
Answer:
There are two primary scales used to measure earthquakes: the Richter scale and the Mercalli scale. The Richter scale is most common in the United States, while worldwide, scientists rely on the Mercalli scale. The moment magnitude scale is another earthquake measurement scale used by some seismologists.
What is the human female reproductive system is adapted for? A. Production of zygotes in ovaries B. External fertilization of gametes C. Production of milk for a developing embryo D. Transport of oxygen through a placenta to a fetus
Answers
If the neurotoxin tetanospasmin is released onto the inhibitory synapse where the coordination of flexion at the elbow occurs, which of the following might happen?
The agonist muscle and the antagonist muscles would both relax, resulting in a flaccid limb.
The agonist muscle and the antagonist muscles would contract, leading to a rigidity in the muscle.
The agonist muscle would relax, while the antagonist muscle would contract.
The agonist muscle would contract while the antagonist muscle would relax.
Answers
Tetanospasmin is a neurotoxin that affects synaptic transmission. When applied to the inhibitory synapse, which controls the coordination of flexion at the elbow, the release of tetanospasmin can drastically disrupt the activity of the synapse.
Here correct answer is2)
As a result, both the agonist muscle and the antagonist muscle, which usually oppose each other, relax. This leads to the limb becoming flaccid as the agonist and antagonist muscles no longer exert the force required to keep the limb in a flexed position. The toxin inhibits the release of the neurotransmitter gamma-aminobutyric acid (GABA), which is responsible for relaxing both the agonist and antagonist muscles.
However, sometimes the agonist muscle and the antagonist muscle can contract when under the influence of the toxin, leading to a rigidity in the muscle. This is caused by the increased inhibitory activity of the toxin, which can result in the activation of several inhibitory interneurons, leading to the contraction of both groups of muscles.
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Which equation correctly represents Newton’s second law of motion
Answers
Answer:
F = ma
Where,
F = forcem = massa = acceleration due to gravity.Explanation:
Newton second law of motion states that the rate of change of momentum of a body is directly proportional to the applied force, and takes place in the direction in which the force acts.
This is given by the relationship;
\(force \: \alpha \frac{change \: in \: momentum}{time \: taken} \)
Which is F = ma
Where,
F = forcem = massa a = acceleration due to gravity.Which statement explains a major taxonomic difference between fungi and plants? A) plant cells are terrestrial, while fungi cells are aquatic. B) plant cells are heterotrophic, while fungal cells are autotrophic. C) plant cell walls contain cellulose, while fungal cell walls contain chitin. D) plant cell walls surround a cell membrane, while fungal cell walls surround a plasma membrane
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Answer:
the answer to this question is A
what is the movement that helps the movement of undigested food through the large intestine?
Answers
Answer:
Food moves through your GI tract by a process called peristalsis. The large, hollow organs of your GI tract contain a layer of muscle that enables their walls to move. The movement pushes food and liquid through your GI tract and mixes the contents within each organ.
Explanation:
hope it help a little
What makes a hypothesis scientifically
Answers
Answer:
The basic idea of a hypothesis is that there is no pre-determined outcome. For a hypothesis to be termed a scientific hypothesis, it has to be something that can be supported or refuted through carefully crafted experimentation or observation
Explanation:
A hypothesis is an educated guess. When scientist make a hypothesis, it gives them a reason to make an experiment to decide whether its accepted or not and they also learn more about that certain subject while doing so. When scientist make a hypothesis, it gives them a reason to make an experiment to decide whether its accepted or not and they also learn more about that certain subject while doing so. Comments
Answer:
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Tell what you know about what comparative anatomy is and how this study provides evidence for change over time.
Answers
can a short pea plant ever be a hybrid?
Answers
Answer:no
Explanation:
it can not be a hybrid because the plant is to short and two recessive genes instead of two different genes
3. Viruses reproduce on their ownTrueOFalse
Answers
Answer:
False
Explanation:
The process in which impurities are removed from a mineral
Answers
Answer:
The removal of impurities is usually done chemically. For example, in the manufacturing of iron, calcium carbonate is added to the blast furnace to remove silicon dioxide from the iron ore. Zone refining is an economically important method for the purification of semiconductors.
Explanation:
which word best defines bilateral symmetry
Answers
Answer:
Explanation:
its a
How is the digestive system related with our diet?
Answers
The digestive system is related to our diet in the sense that this is a specialized organ whose cells known as cylindrical cells, secrete a juice (gastric juice; which is possible because of the gene expression that allows these cells to develop the necessary proteins) that catabolizes the food to acquire nutrients such as glucose from carbohydrates and eventually performs cellular respiration.
Which term describes the relationship in which one organism lives inside the other one. Check ih correct answer
Answers
Answer:
The term that describes the relationship in which one organism lives inside the other one is endosymbiosis.
Explanation:
In which process are glucose and oxygen the reactants?
cellular respiration
photosynthesis
ATP production
ADP production
Answers
Answer: Photosynthesis
Explanation:
5. Fossils in lower rock layers are always
O
more complete
O older
O younger
more plentiful
Answers
older
the deeper you dig into the earth, the farther back into history you are going.
a trophic pyramid for southern lake michigan coastal
please answer it
Answers
Answer:
Topic Pyramid-
Explanation:
the basic structure of interaction in all biological communities characterized by the manner in which food energy is passed from one trophic level to the next along the food chain.
:Hope's It's Help:
After wastewater is treated, where does it go?
Answers
Answer:
What happens to the treated water when it leaves the wastewater treatment plant? The treated wastewater is released into local waterways where it's used again for any number of purposes, such as supplying drinking water, irrigating crops, and sustaining aquatic life.
glycogenissi is stimulated by whereas glycogenlolysis is stimulated by
Answers
Glycogenesis is stimulated by insulin, while glycogenolysis is stimulated by glucagon and epinephrine.
Glycogenesis is the process of converting glucose into glycogen for storage in the liver and muscle cells. Insulin is released when blood glucose levels are high, signaling the body to store excess glucose as glycogen.
On the other hand, glycogenolysis is the breakdown of glycogen into glucose when the body needs energy.
Glucagon and epinephrine are released when blood glucose levels are low, stimulating glycogenolysis to provide glucose for cellular functions. Both processes play essential roles in maintaining blood glucose levels within a healthy range.
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The three parts of the diagram above are in chronological order. In the space below,
identify the blue segment and the yellow segment, then describe and explain the
process that has occurred. (a four to six sentence paragraph is expected!)
Answers
Transcription is the copy process of a segment of the DNA template strand to produce mRNA. The blue segment is DNA, and the yellow segment is mRNA.
What is transcription?The first step before protein arrangement is to synthesize messenger RNA, mRNA.
Transcription is the synthesis of the messenger RNA, mRNA. This event occurs in the nucleus and uses fragments of DNA molecules to do it.
When the DNI molecule separates into two strands to form the transcription bubble, we can identify two separate segments: the coding strand and the template strand.
The coding strand goes in direction 5' to 3', The complementary strand -template strand- grows in direction 3' to 5'.
The template strand is the one that is going to be complemented by the mRNA. RNA polymerase is in charge of reading the original DNI strand for mRNA synthesis.
mRNA molecule grows complementing DNA base sequences. This is,
DNA mRNA
adenine ⇔ uracil
guanine ⇔ cytosine
thymine ⇔ adenine
cytosine ⇔ guanine
Once mRNA synthesis is over, the molecule leaves the nucleus to start the transcription process in the cytoplasm.
Answer:
The blue segment is DNA moleculeThe yellow segment is mRNA molecule1- DNA molecule
2- Separation of the DNI molecule into two strands and mRNA molecule growing.
3- mRNA molecule already synthesized and separated from DNA
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Match the type of joint based on its functional classification.
A)Slightly mobile joint
B)Freely mobile joint
C)Immobile joint
-Synarthrosis
-Amphiarthrosis
-Diarthrosis
Answers
answer:
a. slightly mobile joint - amphiarthrosis.
b. freely mobile joint - diarthrosis.
c. immobile joint - synarthrosis.
Joints can be classified based on their functional mobility. The three types of joints mentioned, along with their corresponding functional classification, are as follows:
A) Slightly mobile joint - Amphiarthrosis
B) Freely mobile joint - Diarthrosis
C) Immobile joint - Synarthrosis
A) Slightly mobile joint - Amphiarthrosis: Amphiarthrosis refers to joints that are slightly mobile. These joints allow limited movement and provide stability and support. Examples of amphiarthrosis joints include the pubic symphysis in the pelvis and the intervertebral discs between the vertebrae in the spine.
B) Freely mobile joint - Diarthrosis: Diarthrosis represents joints that are freely mobile. These joints allow a wide range of movement and are commonly found in the limbs. Examples of diarthrosis joints include the shoulder joint, hip joint, knee joint, and elbow joint.
C) Immobile joint - Synarthrosis: Synarthrosis denotes joints that are immobile or have limited mobility. These joints provide stability and strength but do not permit significant movement. Examples of synarthrosis joints include the sutures in the skull, where the bones are tightly joined together, and the gomphoses found in the teeth sockets.
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which of the following is the slowest conducting tissue in the heart? a. atrioventricular (av) node b. sinoatrial (sa) node c. atrial tissue d. purkinje fiber e. ventricular contractile muscle
Answers
The slowest conducting tissue in the heart is the a. atrioventricular (AV) node.
The heart consists of various tissues responsible for conducting electrical impulses to ensure proper cardiac function. These tissues include the sinoatrial (SA) node, atrioventricular (AV) node, atrial tissue, Purkinje fibers, and ventricular contractile muscle. Among these, the atrioventricular (AV) node is the slowest conducting tissue.
The conduction system in the heart starts with the SA node, which is the natural pacemaker of the heart. The SA node generates electrical impulses that spread throughout the atrial tissue, causing atrial contraction. Next, the impulses reach the AV node, which is located at the junction between the atria and ventricles. The AV node delays the electrical impulses, allowing the atria to complete their contraction before the ventricles contract. This delay in conduction at the AV node is the slowest part of the entire conduction system.
Following the AV node, electrical impulses are rapidly transmitted through the Bundle of His, bundle branches, and Purkinje fibers, which distribute the impulses throughout the ventricular contractile muscle, causing ventricular contraction. The Purkinje fibers and ventricular contractile muscle are faster conducting tissues compared to the AV node.
In summary, the atrioventricular (AV) node is the slowest conducting tissue in the heart, allowing for the proper timing of atrial and ventricular contractions.
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An area of the body that provides afferent, sensory information to the cns and receives efferent , motor information from the cns is called a:________
Answers
An area of the body that provides afferent, sensory information to the cns and receives efferent , motor information from the CNS is called a: The Somatic Nervous System.
There are two main categories of neurons in this system: movable neurons Motor neurons, also known as efferent neurons, transmit information from the brain and spinal cord to muscle fibers all over the body. The somatic nervous system is a part of the peripheral nervous system that is involved in the voluntary control of skeletal muscle movement. The cranial nerves, which transmit information from the brain to the head and neck region, are an illustration of the somatic nervous system. In this area, conscious motor functions are under the control of the somatic nervous system. There are two components to the somatic nervous system: Spinal nerves are mixed nerves that send motor orders into the spinal cord and sensory data into them. The nerve cells that make up the cranial nerves.learn more about somatic nervous system here: https://brainly.com/question/12844785
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Which of the following processes directly requires oxygen (O2)? There is multiple answer Glycolysis Oxidative phosphorylation Citric acid/Krebs cycle Fermentation
Answers
The processes that directly require oxygen (O2) are oxidative phosphorylation and the citric acid/Krebs cycle.
1. Glycolysis: Glycolysis is the initial step in cellular respiration, where glucose is broken down into pyruvate. It does not directly require oxygen and can occur in both aerobic (with oxygen) and anaerobic (without oxygen) conditions.
2. Oxidative phosphorylation: This process occurs in the mitochondria and is the final step of cellular respiration. It directly requires oxygen to function. Oxygen serves as the final electron acceptor in the electron transport chain, allowing the production of ATP through oxidative phosphorylation.
3. Citric acid/Krebs cycle: Also known as the tricarboxylic acid (TCA) cycle, this process takes place in the mitochondria and involves the oxidation of acetyl-CoA derived from glucose, fatty acids, or amino acids. It indirectly requires oxygen as it relies on the availability of NAD+ and FAD, which are regenerated in the electron transport chain that requires oxygen.
4. Fermentation: Fermentation is an anaerobic process that occurs in the absence of oxygen. It involves the partial breakdown of glucose or other organic compounds without the involvement of the citric acid cycle or oxidative phosphorylation.
Therefore, the processes that directly require oxygen are oxidative phosphorylation and the citric acid/Krebs cycle.
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according to the size principle of motor recruitment, in what order will muscle fibers be recruited during activity?
Answers
Answer:
Smallest to largest (fewest fibers to most fibers).
Explanation:
Motor units typically go from smallest to largest as contraction increases. This is known as Henneman's Size Principle.
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