What Is Meant by Variable Expressivity

question 25

Multiple Choice

What is meant by variable expressivity?

• A) When an allele is sometimes dominant and sometimes recessive
• B) When penetrance is 100%
• C) When members of a group of true-breeding wild-type individuals sometimes exhibit the phenotype of a recessive gene
• D) When a group of affected individuals do not all have exactly the same mutant phenotype

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Definitions:

Social Factors

Elements within society, such as family, education, and cultural norms, that influence an individual's behavior and viewpoints.

Environmental Factors

Components external to the individual that can influence their behavior, development, and well-being, including physical, social, and cultural aspects.

Personality Development

The change and growth of an individual's personality traits over time, influenced by genetic, environmental, and social factors.

Social Investment Principle

The theory that individuals' maturity and psychological growth are influenced by their engagement in and commitments to social roles and responsibilities.