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

The correct answer would be C. 1/4

The genotype of both the parents is heterozygous that is, Bb.

So, both of them will produce two types of gametes one of which would contain B and the other one would contain b.

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

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

Thus, the probability of a homozygous dominant (BB) would be 1 out of 4.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).