A Disease Caused by Gene X Is an Autosomal Recessive

question 91

Multiple Choice

A disease caused by gene X is an autosomal recessive disease but is modified by expression of a gene on another chromosome gene Y.If gene Y has at least one dominant allele,then the disease is aggressive and becomes evident at age 2.If gene Y has two recessive alleles,then the disease is mild and dormant until the age of 50.Two people who are heterozygous for both gene X and Y have a child.What are the chances the child will have the aggressive form of the disease?

• A) 9:16 chance
• B) 4:16 chance
• C) 3:16 chance
• D) 1:16 chance
• E) 16:16 chance

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Definitions:

Psychological Disorder

A condition characterized by abnormal thoughts, feelings, or behaviors that are distressing to the individual, and often impair daily functioning.

Depressive Disorders

Mood disorders in which the individual suffers from depression—an unrelenting lack of pleasure in life.

Bipolar Disorder

A mental condition marked by alternating periods of elation and depression, significantly impacting an individual's mood, energy, and daily function.

More Common

Refers to occurring frequently or being prevalent in a particular context or environment.