Mendel concluded that one out of every four F2 pea plants is going to be short. How did he perform his experiment to come to that
conclusion?
A- He self-pollinated the heterozygous Tt tall F1 plants.
B- He cross-pollinated the homozygous TT tall F1 plants.
C- He self-pollinated the homozygous tt short F1 plants.
D- He cross-pollinated the heterozygous Tt tall F1 plants.