Red-Green Color Blindness Is an X-Linked Recessive Trait

question 74

Short Answer

Red-green color blindness is an X-linked recessive trait. Two normal-vision parents have a color-blind son. Indicate the genotype and phenotype of each parent and the son.

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Definitions:

Difference Threshold

The minimum difference in stimulation that a person can detect 50% of the time, also known as the "just noticeable difference" (JND).

Energy

The capacity to do work or the power derived from the utilization of physical or chemical resources.

Original Stimulus

The initial event or object that triggers a sensory or psychological response.

Weber Fraction

A principle stating that the smallest change in a stimulus that can be detected is a constant proportion of the starting level of that stimulus.