Question

Choose the correct answers from the alternatives given.
A human population has a higher-than-usual percentage of individuals with a genetic disease. The most likely, explanation is

• A. natural selection
• B. gene flow
• C. genetic drift
• D. all of these

Answer 1

The correct option is C genetic drift

As a human population is very large so there is greater chance of genetic drift. 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.

So correct answer is C, genetic drift.