A Geneticist Is Studying Various Phenotypic Traits in the Toes

Multiple Choice

A geneticist is studying various phenotypic traits in the toes of rats that are controlled by a mixture of both recessive and dominant alleles. He decides to cross some of his subjects with a new mutant strain that carries a dominant trait for no toes. The progeny of this cross would be an example of

A) epigenetics.
B) chromosomal inactivation.
C) epistasis.
D) imprinting.
E) autosomal polymorphism.