Question

change in the allele frequency of a population due to chance
variation
genetic drift
geographic separation
mutation
frequency
natural selection
evolution

Explanation:

To solve this, we analyze each option:

• "variation" refers to differences in traits, not allele frequency change by chance.
• "genetic drift" is defined as the change in allele frequencies in a population due to random (chance) events.
• "geographic separation" is about physical isolation, not allele frequency change.
• "mutation" is a change in DNA, not chance - driven frequency change.
• "frequency" is a measure, not a process of change.
• "natural selection" is non - random (based on fitness), not chance - based.
• "evolution" is a broad change in species over time, not specifically chance - driven allele frequency change.

Answer:

B. genetic drift