Tay-Sachs Is Inherited as an Autosomal Recessive Allele

question 7

Multiple Choice

Tay-Sachs is inherited as an autosomal recessive allele. Homozygous individuals die within the first few years of life. However, there is some evidence that heterozygous individuals are more resistant to tuberculosis. Which of the following statements about Tay-Sachs is true?

• A) The allele for Tay-Sachs is always selected against.
• B) This situation is an example of heterozygote advantage if tuberculosis is present in a population.
• C) This situation is an example of disruptive selection.
• D) Heterozygotes will be more fit than either homozygote regardless of environmental conditions.

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Definitions:

Medial

Situated towards the middle or center relative to another body part or direction.

Anterior

Refers to the front position or aspect of an object or the body.

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A coherent set of interrelated components or elements functioning together to achieve a specific purpose or objective.

Organs

Structures in organisms composed of different tissues performing specific functions essential for life.