Question

Using a Punnett square workout the distribution of an autosomal phenotypic feature in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

Answer 1

According to the question, a homozygous female with the genotype bb is crossed with a heterozygous male with the genotype Bb. The female will only create one type of gamete, b, whereas the male will produce two types, B and b. The above cross’s Punnett square for the F₁ generation is: