Question

when the frequency of a gene in a population changes, the most likely result would be
1 ecological succession
2 biological evolution
3 species extinction
4 genetic mutation

Explanation:

• Option 1 (ecological succession): Ecological succession refers to the process of change in the species structure of an ecological community over time, which is about community - level changes in species composition, not directly related to gene frequency changes in a population.
• Option 2 (biological evolution): Biological evolution is defined as a change in the allele (gene) frequencies in a population over time. So when the frequency of a gene in a population changes, it is a key indicator of biological evolution.
• Option 3 (species extinction): Species extinction is the complete disappearance of a species. A change in gene frequency in a population does not directly lead to species extinction. Species extinction is a more extreme event that usually involves multiple factors and is not the immediate result of a change in gene frequency within a population.
• Option 4 (genetic mutation): Genetic mutation is a change in the DNA sequence of a gene. Gene frequency change in a population is a result of processes like natural selection, genetic drift, etc. acting on existing genetic variation (including mutations), but a change in gene frequency is not the same as a genetic mutation.

Answer:

1. biological evolution