Question

Which of the following is an example of genetic drift?

An earthquake kills 90% of the green beetles in a population of green, brown, and black beetles.
A green beetle travels from its population into a new population of entirely brown and black beetles.
Green beetles have better camouflage than brown and black beetles and are not eaten as often by predators.
Warm temperatures cause green, brown, and black beetles to start reproducing earlier than normal.

Answer 1

Ok finallllly, I couldn't load the question because of the lag :'c

Ok, well genetic drift defines as: the process of change in the genetic composition of a population due to chance or random events rather than by natural selection, resulting in changes in allele frequencies over time.

So which answer choice has something that where a disaster happened? :3

Answer 2

A

Answer 3

Yes! Great job :DDD

Answer 4

A.) An earthquake kills 90% of the green beetles in a population of green, brown, and black beetles.

Here's why it's not great: the choice says nothing about how many of the other beetles are killed. If 90% of the brown beetles are killed and 90% of the black beetles are killed too, then allele frequencies haven't changed and so there would be no genetic drift taking place as a result of the earthquake.

Rejecting the other responses:
B: That's gene flow, formerly known as "migration."
C: That's directional selection, a subtopic of natural selection, which is a subtopic of selection.
D. That doesn't seem to result in changes in allele frequencies, so that's not evolution at all.

Answer 5

thank you chanty!! nd mss

Answer 6

NP

Answer 7

You're welcome!! :)