Mutations. These have quite a few different causes.
Sexual reproduction is a "more recent source" {beginning 600 million years ago} of genetic variability. The process of sharing genetic information, coupled with the random crossing and mixing of genetic information during the creation of a new organism, leads to another source of genetic variability.
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.
The ultimate source of genetic variability is mutation.
Genetic mutations in an animals genes.
mutation
Independent assortment of chromosomes, crossing over and Random fetiliztion
mutation
Mutation.
The most common source of genetic diversity in a bacterial colony is a mutation. External DNA is assimilated by a cell is transformation.
The ultimate source of variation is mutation. However, recombination, or crossing over, can produce enormous amounts of variation by shuffling alleles into different combinations. Combined, the two processes produce the variation upon which natural selection can act, and which results in evolution.
mutation
mutation
Independent assortment of chromosomes, crossing over and Random fetiliztion
mutation
Human recombination is a significant source of genetic variation.
mutation
Mutation.
mutation
No, natural selection works on that genetic variation presented to it.
Genetic variation, which can lead to evoloution, and then potentially a new species.
Basic source of variation in all organisms is mutation .
What is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.?