The Allele for Polydactyly Is Dominant,but Most Individuals Do Not

question 37

Multiple Choice

The allele for polydactyly is dominant,but most individuals do not exhibit the polydactyly trait.Which of the following explains why this occurs in nature?

• A) The allele for polydactyly is completely penetrant
• B) The allele for polydactyly is never expressed
• C) The allele for polydactyly is incompletely penetrant
• D) The allele for polydactyly is variably expressive
• E) None of these is an adequate explanantion

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Definitions:

Goal Neglect

A cognitive phenomenon where an individual fails to execute actions or tasks which would lead them towards their stated goals, often due to a lack of focus or attention.

Perseveration

The continuous recurrence of a specific reaction, like a word, phrase, or movement, even when the initial prompt or stimulus no longer exists.

Frontal Lobe

The part of the brain located at the front of the cerebral cortex, responsible for voluntary movement, expressive language, and managing higher level executive functions.

Parietal Lobe

A region of the brain associated with processing sensory information regarding the location of parts of the body as well as interpreting visual information and processing language and mathematics.