AP BIOLOGY

EVOLUTION

EVOLUTION OF A POPULATION

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which of the following conditions is MOST likely to result in changes in allele frequencies in a population?

A	absence of natural selection
B	small population size
C	no migrations into or out of a population

Explanation:

Detailed explanation-1: -Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error). Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in small populations.

Detailed explanation-2: -Natural selection can cause microevolution, or a change in allele frequencies over time, with fitness-increasing alleles becoming more common in the population over generations.

Detailed explanation-3: -Genetic drift causes allele frequencies to change at random. 3. Genetic drift leads to a loss of allelic variation within populations.

Detailed explanation-4: -Answer and Explanation: The correct answer is genetic drift. A change over in allele frequency inside a single population over time is called microevolution.

There is 1 question to complete.