Question

8)

In rabbits, the allele for black fur, B, is dominant over the allele for brown fur, b.

Calculate the probability of a homozygous dominant (BB) offspring resulting from a cross between two parents with the genotype Bb.
A)
1
100
B)
1
2
C)
1
4
D)
7
10

Answer 1

i worked the problem out in paper so it would be easier to explain.

Answer 2

The correct answer would be C) 1/4.

The genotype of both parents is Bb.

Thus, each parent would produce two types of gametes. One gamete would contain B and the other would contain b.

The cross would result in the production of offspring with three types of genotypes BB, Bb, and bb in the ratio 1:2:1.

The phenotype ratio would be 3(black fur): 1 (brown fur).

Thus, the frequency or probability of BB would be one out of four, that is, 1/4.