A Recessive Allele on the X Chromosome Causes Color Blindness

question 18

Multiple Choice

A recessive allele on the X chromosome causes color blindness. A noncolor-blind woman (whose father is color blind) marries a color-blind man. What is the chance that their son will be color blind?

• A)0%
• B)25%
• C)50%
• D)75%
• E)100%

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Definitions:

Withdrawal

The process of reducing or discontinuing the use of a substance, causing physical and mental symptoms varying based on the substance and usage duration.

Secondary Prevention

Level of preventive medicine that focuses on early diagnosis, use of referral services, and rapid initiation of treatment to stop the progress of disease processes.

Chest Discomfort

A common symptom that can be caused by a wide range of conditions, from muscular strain to heart problems.

Electrocardiogram

A test that records the electrical activity of the heart to detect any heart problems.