The following list contains possible combinations for pea plant seed shape. Round (R) is a dominant trait, and wrinkled (r) is a recessive trait. Choose the combination (s) that would result in a plant with wrinkled seeds. Select all that apply

A. RR

B. Rr

C. rr

Wrinkled seeds are associated with a a recessive trait, which means that in order for this trait to be expressed, both versions of the gene need to have the "wrinkled" form in them: otherwise the dominant trait would be expressed.

the correct answer is that only the combination rr would result in a plant with wrinkled seeds.