In a certain species of animals, black fur (B) is dominant over brown fur (b). Show the possible ratio of genotypes and phenotypes of the offspring of the pure breeding different coloured parents.

Question

Philoid · Accepted Answer

When a pure breeding with black fur (BB) animal species crossed with a pure-breeding with brown fur (bb) animal species, the offsprings are obtained as follows in F₁ and F₂ generation.

Thus,

Genotypic ratio = 1 (Homologous black fur) : 2 (Heterozygous black fur) : 1 (Homozygous brown fur)

Phenotypic ratio = 3 (Black fur) : 1 (Brown fur)