how does variation occur in living things natural selection genetic drift
Answers
Answered by
6
These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. Typically, genetic drift occurs in small populations, where infrequently-occurring alleles face a greater chance of being lost. ... Both possibilities decrease the genetic diversity of a population.
Answered by
5
Natural selection and genetic drift are basic for evolution and essential for variation in living organisms for the continity of the species generation after generation.
•Natural selection - over a time , traits that prove to be most adaptive increase in a population and other do not , this process that bring about this change is called natural selection, which affects the relative abundance of alleles that are responsible for most adaptive and not so , adaptive traits.
Thus , traits in a population can change over the time , means population can evolve.
•Genetic drift is the change in the frequency of an existing gene variant in a population due to random sampling of organisms. The alleles in the offspring are a sample of those in the parents, and chance has a role in determining whether a given individual survives and reproduces.
•Natural selection - over a time , traits that prove to be most adaptive increase in a population and other do not , this process that bring about this change is called natural selection, which affects the relative abundance of alleles that are responsible for most adaptive and not so , adaptive traits.
Thus , traits in a population can change over the time , means population can evolve.
•Genetic drift is the change in the frequency of an existing gene variant in a population due to random sampling of organisms. The alleles in the offspring are a sample of those in the parents, and chance has a role in determining whether a given individual survives and reproduces.
Similar questions