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sp2606 [1]
3 years ago
9

1. A brown mink crossed with a silver-blue mink produced all brown offspring. When these F1 were crossed among themselves, they

produced forty-seven brown animals and fifteen silver-blue animals. What are the genotypes of the parentals and the F1s
Biology
1 answer:
emmasim [6.3K]3 years ago
3 0

Answer:

The correct answer is -

Parental - BB and bb

F1

Genotypes: 100% Bb  

F2

Genotypes: ¼ BB, ½ Bb, ¼ bb

Explanation:

It is given that a cross between a brown and a silver-blue mink produces all brown offspring and it is only possible if brown is dominant over silver blue in true breed cross, assume brown trait is represented by B and silver-blue is b then parents will be

BB and bb

   B    B

b  Bb   Bb

b  Bb   Bb

Cross between F1 individuals: Bb cross Bb

gametes : B, b and B, b

   B     b

B  BB   Bb

b   Bb    bb

the genotype of F2 : 1:2:1 = ¼ BB, ½ Bb, ¼ bb

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You are studying a population of snapdragon plants on Membata Island. In snapdragons, the dominant allele CR encodes red flowers
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Answer:

we will know that the allelic frequencies are for R 0.95 and r 0.05

Explanation:

We know that the population is in Hardy-Winberg equilibrium, we deduce the following formula:

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data

R: red flower allele

r: allele blor blanca

p would be equal to the allelic frequency R

q will be equal to the frequency allelic r

2p = RR

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7 0
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Read 2 more answers
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