However, when pea plants are 12–14 inches tall, many gardeners cut off the top ... A shelling pea, Pisum sativum ‘Little ...

The patient monk carefully bred and cross-bred pea plants to see how a few specific traits -- height was one -- were passed down. When Mendel bred a tall plant to a short one, all of the offspring ...

The height of pea plants is controlled by a single gene which has two alleles: tall and short. The tall allele is dominant and is shown as T. The small allele is recessive and is shown as t.