The Graph Shows the Range of Variation Among Population Members

question 215

Multiple Choice

The graph shows the range of variation among population members for a trait determined by multiple genes. Suppose that there were no genetic component to this trait.If this population were subject to stabilizing selection for several generations, which distributions would be most likely to result? Assume that the environment stayed the same.

• A) a
• B) b
• C) c
• D) d
• E) None of the above; there would be no change in the distribution.

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Definitions:

Contractility

The ability of muscle cells and tissues to contract or shorten, generating force.

Tendons

Tough, fibrous tissues that connect muscles to bones, allowing for the transmission of force when muscles contract.

Canaliculi

Small, channel-like structures in bones that allow for communication and nutrient exchange between bone cells.

Haversian Canals

Channels extending through the matrix of bone; contain blood vessels and nerves.