Question

Gene frequencies may vary within populations by chance father than by natural selection. This is referred to as:

• A. Gene flow
• B. Genetic drift
• C. Genetic load
• D. Mutagenesis

Answer 1

Answer:

B. Genetic drift

• Variation in gene frequencies within populations can occur by chance and is called as genetic drift.

• Genetic drift is an important mechanism in evolutionary change in small population.

• Random change in the frequencies of alleles occur from generation to generation due to chance events.