The Genotypes and Phenotypes That Result from the Cross of Aa

question 12

Multiple Choice

The genotypes and phenotypes that result from the cross of Aa and Aa (A = normal pigmentation and a = albinism) are

• A)phenotypes:75% normal and 25% albino; genotypes:25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.
• B)phenotypes:50% normal and 50% albino; genotypes:all homozygous recessive.
• C)phenotypes:50% normal and 50% albino; genotypes:50% homozygous recessive and 50% homozygous dominant.
• D)phenotypes:25% normal and 75% albino; genotypes:25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.

---

Definitions:

Guthrie

An American psychologist who proposed the theory of contiguity, suggesting that learning occurs when a stimulus and response occur close together in time.

Crying Behavior

An emotional and physiological response that can serve various functions, including communication, self-soothing, or as a response to stress or stimuli.

Store

To keep or accumulate something for future use.