Tay-Sachs Is Inherited as an Autosomal Recessive Allele

question 42

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 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:

Diversifiable Risk

The portion of investment risk that can be reduced or eliminated through diversification among different assets.

Financial Leverage

Utilizing debt to finance additional assets, aiming to increase returns to shareholders but also increasing risk.

ROE

A metric indicating how effectively a company uses shareholders' funds to generate profits.

Financial Leverage

The use of borrowing to increase the potential return of an investment.