How Does Genetic Drift Affect Small Populations Differently Than Large

question 2

Multiple Choice

How does genetic drift affect small populations differently than large populations?

• A) Smaller populations can be transformed into large ones if genetic drift is sufficiently nonrandom.
• B) Since genetic drift is a random effect, it has the same outcome in large and small populations.
• C) An entire trait and its underlying genetic basis can disappear from a small population quickly, but may be maintained in a large population.
• D) Since there are many instances of a rare trait in the large population, it is more likely to be selected out, and disappear, in that larger population.

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Definitions:

Volcanic Dome

A rounded volcanic feature created by thick lava that does not flow far from its eruption site, often forming after an eruption.

Scoria Cone

A small, steep volcanic cone built from lava fragments (scoria) ejected during gas-charged explosive eruptions.

Pumice

A light, porous volcanic rock formed from explosive eruptions, known for its ability to float on water.

Welded Tuff

A type of rock formed from volcanic ash ejected during an eruption, which then falls and welds together under high temperature and pressure.