Pea shape is controlled by a gene that specifies an enzyme known as Sbe1 (for Starch-branching enzyme 1).A recessive allele of Sbe1 likely encodes
A)an Sbe1 enzyme with reduced function.
B)an Sbe1 enzyme with a new function.
C)a different type of enzyme.
D)an Sbe1 enzyme with enhanced catalytic activity.

Question

Quizplus · Accepted Answer

A recessive allele typically results in a gene product with reduced or no function, rather than a new function, a different enzyme, or enhanced activity. In this case, a recessive allele of Sbe1 would likely encode an Sbe1 enzyme with reduced function.

Pea Shape Is Controlled by a Gene That Specifies an Enzyme