What are 3 causes of variation within a population?

Answer 1

Changes within a gene pool occurring from generation to generation is called microevolution.

Allele frequencies in a population may change due to gene flow, genetic drift, natural selection and mutation. These are referred to as the four fundamental forces of evolution.

Only mutation can create new genetic variation...the other three forces simply rearrange this variation within and among populations.

Answer 2

Variations occur due to mutations. There are three factors of mutations which impact the formation of new genotypes.

1) Point Mutations - Very small impact mutation which still might enhance the protection against environment and reproduction.

2) Mutations that alter Gene number and sequence - has major role in evolution as it might help to add new functions.

3) Mutation Rates - In animals and plants mostly very slow, however, prokaryotes due to high rate are able to mutate very fast.

Answer 3

1. Genetic mutations: These are changes in the DNA sequence that can result in new traits or variations within a population.
2. Sexual reproduction: The combination of genetic material from two parents creates genetic diversity in offspring.
3. Environmental factors: External influences such as diet, climate, and habitat can also contribute to variation within a population.

Answer 4

Things that cause genetic variation are independent assortment, crossing over and fertilization.

Answer 5

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