In which situation are phenotype and genotype always the same?
A)X-linked-recessive traits
B)X-linked-dominant traits
C)Autosomal-recessive traits
D)Autosomal-dominant traits

Question

Quizplus · Accepted Answer

Autosomal-recessive traits are only expressed in the homozygous state in which the genotype matches the phenotype. Autosomal-dominant traits can be expressed in either the homozygous or the heterozygous state. Thus, with autosomal-dominant expression, phenotype and genotype do not have to match. In X-linked-recessive traits, males express the trait in a dominant manner. In X-linked-dominant traits, females express the trait in either the homozygous or heterozygous state.

In Which Situation Are Phenotype and Genotype Always the Same