If a dihybrid cross is begun with a P1 generation of a true-breeding plant that produces smooth and yellow peas (smooth and yellow are both dominant traits),crossed with a plant that produces wrinkled green peas (wrinkled and green are both recessive traits),the F1 plants will all be smooth and yellow.

Question

Quizplus · Accepted Answer

This is because both dominant traits, smooth and yellow, are present in the P1 plant and will be passed on to all of the F1 offspring. The recessive traits, wrinkled and green, will be masked by the dominant traits.

If a Dihybrid Cross Is Begun with a P1 Generation