Why Have Gene Families Evolved? Choose the Most Accurate Answer

question 13

Multiple Choice

Why have gene families evolved? Choose the most accurate answer for gene families in general.

• A) Although in some cases researchers have inferred that gene families are adaptive, gene families may also evolve due to genetic drift.
• B) Having multiple copies of a gene can increase transcription and translation of the gene, so when increased transcription is adaptive, then natural selection favors genes duplicating into gene families.
• C) Gene families are adaptive because each gene can produce a slightly different protein, which allows for diverse functions that are favored by natural selection.
• D) Gene families evolve because of the activity of mobile genetic elements, which cause repeated gene duplication events.

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Definitions:

Coupon Bond

A debt security that pays the holder a fixed interest rate (the coupon) periodically until maturity, at which point the principal is repaid.

Basis Point

A unit of measure used in finance to describe the percentage change in the value or rate of a financial instrument, equal to 1/100th of 1%.

Bond Prices

The cost or value of a bond, which can fluctuate based on interest rates, credit quality of the issuer, and other factors.

Yields

Yields refer to the earnings generated and realized on an investment over a particular period, expressed as a percentage based on the investment’s cost, its current market value, or its face value.