Suppose that hair color is a single-gene trait and that dark hair is dominant and blonde hair is recessive. Also, suppose that Terry's mother has dark hair and his father has blonde hair. If Terry has blonde hair, we would ______ Terry's phenotype for hair color and would ________ Terry's genotype for hair color.
A) know; not know
B) not know; know
C) know; know
D) not know; not know

Question

Quizplus · Accepted Answer

In genetics, the phenotype refers to those traits that are expressed in the individual. Thus, we know the phenotype: Terry has blonde hair. The genotype refers to the genetic code of a given individual. Because blonde hair is recessive, we can determine Terry's genotype: he would have to have inherited recessive genes from both his parents.

Suppose That Hair Color Is a Single-Gene Trait and That