Which allele combinations are possible for the offspring of two parents that are heterozygous for tall stems (Tt)?

Question

a.TT and Tt
b.TT, Tt, and tt
c.Tt and tt
d.TT and tt

Answer 1

The answer is b. TT, Tt, and tt are all possible allele combinations for the offspring of two parents that are heterozygous for tall stems (Tt).

When two heterozygous individuals reproduce, each parent can pass on either a T or a t allele, resulting in four possible allele combinations for their offspring: TT, Tt, tT, and tt. However, since T and t alleles are essentially the same, only three true genotype combinations exist: TT, Tt, and tt.