If the alleles on the outside of the Punnett square are paired up in each intersecting square in the grid, it becomes clear that, in this particular cross, the female parent can contribute only ...

In this genetic cross, Parent 1 is still tall but is heterozygous with alleles Tt. Parent 2 is short and is homozygous with alleles tt. In this Punnett square the top row shows the female alleles ...