ifi DNA Unit Test BIOLOGY IA / DNA Epistasis is observed when the allele of one gene masks the effects of another gene. Use the Punnett square to answer the question. AB Ab ab Vocabulary.com aB ab AB AABB AABb AaBB AaBb black black black black Ab AABb AAbb AaBb Aabb black brown black brown aB AaBB AaBb aaBB aaBb black black yellow yellow Spolity Web Player O Shapchat AaBb Aabb aaBb aabb black brown yellow ? What color would a dog's fur be if its genes are aabb? 31 Il O a​

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Answer 1

Recessive epistasis occurs when the recessive allele of one gene is epistatic over the other gene. The resulting phenotypic ratio is 9:3:4. In the exposed example, the phenotype of the aabb dog is yellow. Option A.

What is epistasis?

Epistasis means interruption and refers to interactions between genes located in different loci in the same chromosome.

An epistatic gene can alter, influence, or suppress the expression of a hypostatic gene.

Epistasis might be either dominant or recessive,

When the epistatic gene is dominant, the interaction is known as dominant epistasis.

The phenotypic ratio resulting from dominant epistasis is 12:3:1.

When the epistatic gene is recessive, the interaction is known as recessive epistasis.

The phenotypic ratio is 9:3:4.

The exposed situation is an example of recessive epistasis, in which two diallelic genes affect the dog's fur color,

B is a dominant allele that codes for black color.b is a recessive allele that codes for brown color.

A is the dominant allele that allows the expression of pigment.a is the recessive allele that that inhibits pigment expression. In this case, fur is yellow.

The presence of at least one A allele is enough to express black (BB or Bb) or brown (bb) color. The absence of the A allele inhibits pigment expression.

The possible genotypes and phenotypes are,

AABB, AaBB, AaBb, AABb ⇒ Black AAbb, Aabb  ⇒ BrownaaBB, aaBb, aabb ⇒ Yellow

As we can see in the Punnett square, the phenotypic ratios are 9:3:4

9/16 black dogs3/16 brown dogs4/16 yellow dogs.

So the genotype aabb expresses yellow color. The genotype aa inhibits color expression, so the dog's fur is yellow. Option A is correct.

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Complete question:

Epistasis is observed when the allele of one gene masks the effects of another gene.

Use the Punnett square to answer the question.

What color would a dog's fur be if its genes are aabb?

A. yellow

B. brown

C. black

D. white

Punnett square

                AB                      Ab                     aB                       ab

AB         AABB (black)   AABb (black)    AaBB (black)      AaBb (black)

Ab         AABb (black)   AAbb (brown)   AaBb (black)      Aabb (brown)

aB         AaBB  (black)   AaBb (black)    aaBB (yellow)     aaBb (yellow)

ab         AaBb (black)     Aabb (brown)   aaBb (yellow)    aabb (???)


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Answer:

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Explanation:

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Answer:

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acetylcholinesterase degrades ach in the synapse. if a neurophysiologist applies onchidal (

constant muscle stimulation paralysis of muscle tissue decrease in the frequency of action potentials no effect

convulsions due to constant muscle stimulation

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Answer:

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Explanation:

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Hence, small fragments are sequenced and organized with computer.

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Proteins with nuclear localization signals, that are bound to nuclear import receptors enter the nucleus through nuclear pore complex.

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Atrioventricular valve cusps are prevented from everting (swinging upward into the atria) by contracting papillary muscles.

The chordae tendineae are pulled when the papillary muscles contract, which prevents the atrioventricular valves' cusps from opening and allowing blood to return to the atria. Thin, fibrous tissue strands known as chordae tendineae join the two atrioventricular valves—the mitral valve and the tricuspid valve—to the ventricles. The cusps or flaps of each valve are held in place by the chordae tendineae and papillary muscle. Pressure gradients across the valves cause the mitral and tricuspid valve cusps to close as the ventricles contract. Blood may leak backward or vomit if the chordae tendineae are not sufficiently taut, so the cusps can shut properly. The mitral valve cusps, in this instance, are prolapsing or failing to seal completely. From the ventricle, blood is dripping back into the left atrium.

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trace the movement of a hormone from the organ that produces it to its target binding site (organ or tissue). how does this hormone get from the organ/gland that produces it to its binding site

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4. MSUD is found in one newborn in 200,000 throughout the United States, but one newborn in 200 in the Amish and Mennonites of Lancaster County, Pennsylvania has the disease. Why is there such a difference in the prevalence of the disease?​

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Answer:

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MSUD occurs more often in communities that have little genetic variation (such as the Mennonite and Amish community) These groups have a closure of people (like they marry with their closed relatives) who are carriers of the mutated gene.

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Answer: Nectar

Explanation:

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The peppered moth's evolution is an example of how air pollution during the Industrial Revolution caused directional colour changes in the moth population.

At that time, a manifestation of industrial melanism was the rise in the number of dark-colored moths. Later, as pollution levels dropped, the light-colored form once more took control. Charles Darwin's theory of natural selection underwent its first test with the industrial melanism in the peppered moth, which is still used as a standard illustration for explaining evolution.

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Use complete sentences to explain how important the shape of an enzyme is.
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Answers

Answer:

The shape of an enzyme is important because it determines the enzyme's function. The active site is the specific area on the enzyme where chemical reactions occur. The active site is specific to the type of substrate that the enzyme is designed to work with, and its shape must match the shape of the substrate in order to facilitate a chemical reaction. If the shape of the enzyme changes, the active site may no longer match the shape of the substrate, and the enzyme will no longer be able to function properly. This process is known as denaturation, and it occurs when the enzyme's shape is altered due to changes in temperature, pH, or other environmental conditions. When an enzyme is denatured, it becomes inactive and is no longer able to catalyze chemical reactions. Therefore, the shape of an enzyme is critical to its function, and any changes to its shape can significantly impact its ability to carry out chemical reactions.

Explanation:

Please help will mark brainliest
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This statistics says that diffusion employs a certain kind of molecular transport.

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Molecules used to create inorganic chemicals known as molecular substances. Common substances as co2 and water (H2O) are examples (CO2). These compounds are very different from ionic compounds like sodium chloride (NaCl).

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find the value of x in this problem Laboratory experiments conducted with particle accelerators confirm predictions made by the theory that unifies ______ What might help you gain a fresh perspective on your writing? PLS ANSWER! compare and contrast the structure of hebrew society before and after kings ruled them. What did the Texas settlers during the Revolution and Republic era have in common with the colonists of the original Thirteen Colonies?A.They opposed taxes.B.They wanted to be given free land.C.They opposed slavery.D.They wanted to make their own rules. Earth Science Many massive stars end their life cycles as black holes. Why do astronomers not believe the sun will end its life cycle as a black hole?1. It is not massive enough.2. It is much too hot.3. It is much too hot.4. It is not a binary star.Which accurately describes coral reefs? Select the three correct answers.(2 points)1. Coral reefs often are located in nutrient-poor waters.2. Coral reef ecosystems have low biodiversity.3. Coral reef ecosystems are among the most biodiverse on Earth.4. Coral reefs are sturdy structures that can exist for thousands of years.5. Coral reefs are delicate structures that usually exist for less than 10 years.6. Coral reefs often are located in nutrient-rich waters. Question 22 Multiple Choice Worth 3 points)(01.01 MC)Read the excerpt from The Jester's Sword by Annie Fellows Johnston. Then answer the question that follows.And as he journeyed on he pictured often to himself the day of his returning, the day on which his vow should find fulfillment. How wide the gates would be thrown open for hiswelcome! How loud would swell the cheers of those who thronged to do him honor! His dreams were always of that triumphal entrance, and of Vesta's approving smille. Neveronce the shadow of a thought stole through his mind that it might be far otherwise. Was not he born for conquest? Did not the very stars foretell success?The connotation of the bolded words and phrases creates a certain mood in this passage. Which word best represents that mood?ConfidenceDespairImpossibilityQOUneasiness In 3-5 sentences, explain how the environment may be a factor that helps determine adaptations. Use deer as an example. Can someone help me with this real quick? elect the correct answer from each drop-down menu.How might this factory affect the carbon and water cycle?A photo shows smoke coming out from industrial chimneys against the backdrop of a clear morning sky.The factory can affect the carbon cycle by releasing carbon dioxide into the atmosphere. Because carbon dioxide is a , it can trap the Suns heat in the atmosphere. Because the factory is made of concrete, it may deplete groundwater levels over time by not allowing water to . an activity ratio that measures how many times the inventory is turned over to meet the total sales figure is called the inventory turnover. a. true b. false WILL GIVE BRAINLIEST!The aquarium has one fewer redfish than blue fish. 60% of the fish are blue. How many blue fish are in the aquarium? Show your work. PLEASE HELP ME ITS DUE TONIGHT PLEASEEEE1.How do you think Murrays experiences during segregation may have impacted and influenced her?2.Why was Murrays family worried about her applying to UNC? What does this tell you about the society inwhich African Americans were living at the time? determine whether or not the distribution is a discrete probability distribution and select the reason why or why not. X = 0, 1, 9P( X = x ) | 0.41 | 0.6 | 0.06 100 POINTSFind the focus. x^2 = 6y (please explain, I want to understand the solution) when a political party makes a(n) for an elected office, it selects a person to run as the party's candidate in the general election for that office. How do quotas affect pricesA)They keep them highB)They lower themC)They keep them the sameD)They do not change price consider the interaction between labor and capital within the production process and answer the following questions. how do economists refer to the amount of capital employed per worker? nitrogen is a nutrient needed by plants for growth. nitrogen is naturally cycled into the soil where it is rapidly absorbed by plants. what would a farmer most likely do to replenish nitrogen that was depleted from the soil? true or false: we can determine if a star is moving toward or away from earth by measuring its brightness.