Question

Two different strains of sweet peas are true-breeding and have white flowers. When plants of these two strains are crossed, the F1 offspring all have purple flowers. This phenomenon is called:__________

Answer 1

The phenomenon where two different true-breeding strains of sweet peas with white flowers produce F1 offspring with purple flowers is called incomplete dominance.

Step-by-step explanation:

The phenomenon where two different true-breeding strains of sweet peas with white flowers produce F1 offspring with purple flowers is called incomplete dominance. In this case, neither trait is completely dominant over the other, resulting in a blending of the flower color in the F1 generation. This is different from complete dominance, where one trait completely masks the other.