Question

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

Answer 1

Female can be represented as TT (homozygous tall) and male can be represented as Tt (heterozygous tall). Thus, using Punnett square, their cross can be given as follows:

Thus, in the first filial generation, all offsprings will be phenotypically dominant, i.e. tall, whereas genotypically 50% will be homozygous tall and 50% will be heterozygous tall.