Why Are Lethal Alleles Usually Recessive

question 6

Multiple Choice

Why are lethal alleles usually recessive?

• A) Dominant lethal alleles are very uncommon but recessive lethal alleles are very common
• B) Lethal alleles prevent an organism reproducing
• C) Lethal alleles are usually dominant rather than recessive
• D) Recessive lethal alleles can be passed from generation to generation but dominant lethal alleles are not inherited.

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Definitions:

Voluntary Behaviors

Actions that are performed intentionally, under an individual's control, as opposed to automatic or reflexive actions.

Social Learning Theory

A theory that suggests people learn from one another via observation, imitation, and modeling.

Higher Order Conditioning

A learning process whereby a stimulus that has been conditioned to produce a particular response is used in turn to condition a second stimulus to produce the same response.

Extinction

In psychology, the gradual weakening and eventual disappearance of a conditioned response.