Genetic Drift Flashcards

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1
Q

1.

A

Change in allele frequency happens by chance (not natural selection). More likely to occur in smaller populations.

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2
Q

2.

A

A few individuals may produce more offspring than survive (by chance) especially when selection pressures are not strong.

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3
Q

3.

A

Their alleles are passed on and increase in the population.

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4
Q

4.

A

Genetic drift is more likely to occur in island populations and therefore there is more interbreeding.

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5
Q

5.

A

This decreases the gene pool. As it is a small population, over generations only one allele of a gene may be present.

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