If Two Genes Control a Trait and Each Has a Dominant

question 24

Multiple Choice

If two genes control a trait and each has a dominant and a recessive allele,there are ____ phenotypic classes in the F2 generation.

• A) three
• B) five
• C) nine
• D) sixteen
• E) thirty-two

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Definitions:

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.

Scaffold

A framework that offers children temporary support as they develop higher levels of thinking.

Schema

A mental structure of preconceived ideas, a framework representing some aspect of the world, or a system of organizing and perceiving new information.

Critical Period

A specific time in development during which the presence or absence of certain experiences has a profound influence on the formation of abilities or characteristics.