Question

What decreases genetic variation?

Answer 1

Genetic variation:

1. Genetic variation generally refers to the difference in genes between individual members of a population.
2. It is incredibly important for the survival and adaptation of a species as it helps in terms of natural selection and evolution.
3. In the genetic variation the genes of organisms within a population change.
4. The study of human genetic variations has evolutionary significance and medical applications.
5. It can help scientists to understand ancient human population migrations as well as how human groups are biologically related to one another.

The factors decreasing genetic variation are:

1. Genetic variations decrease due to gene flow (migration).
2. As the migrants move between populations they homogenize allele frequencies among populations.
3. It also decreases by inbreeding and inbreeding depression.
4. Genetic drift becomes more important than natural selection as the main evolutionary force.