8. Development Across the Life Span

The sex chromosomes for a female are

Genes that tend to fade into the background when paired with a more dominant gene are called

A trait such as strawberry blonde hair may be explained by the inheritance of the recessive gene for blonde hair and the recessive gene for red hair, or _____ inheritance.

Cleo has green eyes, even though her mother and father each have brown eyes. What might that indicate about Cleo's parents?

A _____ will always be expressed in the observable trait.

Genes are located on

Genes that actively control the expression of a trait are referred to as