A Recessive Allele on the X Chromosome Is Responsible for Red-Green

question 19

Multiple Choice

A recessive allele on the X chromosome is responsible for red-green color blindness in humans.A woman with normal vision whose father is color blind marries a color-blind male.What is the probability that this couple's first son will be color blind?

• A)25%
• B)50%
• C)about 66%
• D)75%
• E)about 33%

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Definitions:

Many-trait Approach

A method in personality psychology focusing on the relationship between a wide range of personality traits and behaviors or outcomes.

Essential-trait Approach

A theory in psychology that identifies a small number of key personality traits that can describe and predict individual behavior.

Single-trait Approach

A method in personality research focusing on how one characteristic influences a range of behaviors.

Typological Approach

The research strategy that focuses on identifying types of individuals. Each type is characterized by a particular pattern of traits.