?

AP® Biology

Free Version

Upgrade subject to access all content

Moderate

Evolution: Genetic Drift Example

APBIO-XNNEWK

Which of the following scenarios is an example of genetic drift?

A

An unusually cool spring causes a species of firefly to begin reproducing in July rather than the normal mating period of June.

B

An earthquake kills 90% of all the long-flashing fireflies in a population of long-, medium-, and short-flashing fireflies.

C

A long-flashing firefly migrates from its original population to a new population comprised entirely of medium- and short-flashing fireflies.

D

Short-flashing fireflies are more difficult to hunt and are eaten less often by predators than medium- and long-flashing fireflies.