IF AN INDIVIDUAL HAS A RECESSIVE PHENOTYPE FOR A PARTICULAR TRAIT,...

66) If an individual has a recessive phenotype for a particular trait, it can be concluded that

A) both parents also had a recessive phenotype for that trait.

B) only one parent had a recessive phenotype for that trait.

C) both parents were homozygous for the dominant gene for that trait.

D) each parent had at least one recessive gene for that trait.

E) both A and C Answer: D

Diff: 3 Page Ref: 36

Topic: 2.3 Fundamental Genetics

Type: (Conceptual)

Rationale: To answer this question correctly, students need to understand the relation between the

concepts of phenotype and genotype. If a person has a recessive phenotype for a particular trait, they must

have two recessive genes for that trait, one from the mother and one from the father.