A heterozygous dominant green pea plant is crossed with a homozygous recessive yellow pea plant.

Which of the following Punnett squares correctly represents the possible offspring resulting from this cross?

3rd choice

Explanation:

When creating a Punnett square, one parent's alleles are written across the top of the square and the other parent's alleles are written down the left side. Then, the predicted genes of the offspring are written inside the grid like a multiplication table.