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pochemuha
3 years ago
8

What is the probability of producing offspring that is white in color? If I said 50% how would it be wrong.

Biology
2 answers:
Vaselesa [24]3 years ago
3 0
1. In snapdragons, the color of the flower is controlled by incomplete dominance. The two alleles are red (R) and white (r). What is genotype of a pink snapdragon? Answer Choice Feedback A. or Incorrect. This snapdragon would be white. B. RR Incorrect. This snapdragon’s phenotype would be red. C. Rr Correct! Since the snapdragon is controlled by incomplete dominance, one allele for red (R), and one for white (W) would result in a pink flower. D. Rw Incorrect. This is not written correctly 2. If a pink-flowered plant is crossed with a white-flowered plant what is the probability of producing a pink-flowered plant? (Hint: Draw a Punnett square to help you answer the question) Answer Choice Feedback A. 25% Incorrect. The genotype for the pink flower is Rr and the genotype for the white flower is or. This would lead to a 50% chance of the offspring having a phenotype of pink. B. 50% Correct! The genotype for the pink flower is Rr and the genotype for the white flower is rr. This would lead to a 50% chance of the offspring having a phenotype of pink. C. 75% Incorrect. The genotype for the pink flower is Rr and the genotype for the white flower is or. This would lead to a 50% chance of the offspring having a phenotype of pink. D. 0% Incorrect. The genotype for the pink flower is Rr and the genotype for the white flower is or. This would lead to a 50% chance of the offspring having a phenotype of pink. 3. Bernadette is blood type O. She has two sisters. One sister has blood type A and the other has blood type B. Using this information and your knowledge of how blood type is determined, determine the genotypes of Bernadette’s parents for this trait. Answer Choice Feedback A. I Ani, IB I Correct! The genotype for type O blood (Bernadette’s type) is “ii”, so both parents must have at least on “i”. Since one sister is type B, one parent must have the IB allele. Since the other sister is type A, then one parent must have the IA allele. B. I A I A, IA I An Incorrect. This would result in children with only type A blood. C. I B me B, IB I B Incorrect. This would result in children with only type B blood D. I B I, IB I Incorrect. This would result in offspring with either type O blood or type B.
Crazy boy [7]3 years ago
3 0
Ok I would say look at the diagram. There should be one in some sort of form. from there you are able to determine the percentages. Also if it's in the form of a punnett square it should be relatively easy. if it was white vs black you have too first look at the traits of the parents.
let B - black and b - white (B is black BC it is dominant).
for example, P1 =Bb , p2 =Bb
then, BB - 25%, Bb - 50%, & bb - 25%.
if let's say one parent was BB, and the other was Bb then there is a 50/50.

Hope this wasn't confusing. :)
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Complete question:

A sample of butterflies contained 50% yellow-winged individuals and 50% black-winged individuals. In this species, wing color is determined by a single gene with two alleles, and the allele for black is dominant. Which of the following statements about the allele frequencies in the sample would most likely be true?  Do not assume that this sample was obtained from a population in genetic equilibrium.

a)The frequency of the yellow allele is greater than that of the black allele.

b)The allele frequency of yellow is 3 times the allele frequency of black.

c)The allele frequency of yellow is twice the allele frequency of black.

d)The allele frequencies of black and yellow are equal.

e) The allele frequency of black is greater than the allele frequency of yellow.

2.Now assume that the population of butterflies sampled in question above is in Hardy-Weinberg equilibrium. Also assume that the sample is random and large enough that the allele frequencies in the sample equal the allele frequencies in the population.  What is the frequency of the allele for a) yellow wings in the population? Assuming Hardy-Weinberg equilibrium in question 1, what would the correct answer be and why?

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Explanation:

Due to technical problems, you will find the complete explanation in the attached files

Download pdf
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