Question

The following are the factors that influence the evolution as follows:
1. migras gene
2. gene mutation
3. natural selection
4. recombination of genes.
in evolution, genetic variation can be caused by ...
A. 1 and 2
B. 1 and 3
C. 2 and 3
D. 2 and 4
E. 3 and 4

Answer 1

There are three primary sources of genetic variation.
1:Mutations are changes in the DNA. A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations.
2:Gene flow is any movement of genes from one population to another and is an important source of genetic variation.
3:Sex can introduce new gene combinations into a population. This genetic shuffling is another important source of genetic variation.