Two True-breeding stocks of pea plants are crossed. One parent has red, axial flowers and the other has white, terminal flowers; all F₁ individuals have red, axial flowers. The genes for flower color and location assort independently. If 1,000 F₂ offspring resulted from the cross, approximately how many of them would you expect to have red, terminal flowers?

Question

Quizplus · Accepted Answer

The F1 generation shows that red and axial are dominant traits. In the F2 generation, the phenotypic ratio for two independently assorting traits is 9:3:3:1. Red, terminal flowers represent one of the 3/16 categories (red is dominant, terminal is recessive). Therefore, 3/16 of 1000 is approximately 190.

Two True-Breeding Stocks of Pea Plants Are Crossed