Sometimes a mutation is beneficial to an organism's fitness and can be passed on to offspring. what is likely to happen to the mutation over many generations? (2 points)
any genetic variation will not persist because the mutation is a one-time event.
there is a random chance of the mutation spreading to other individuals in the population.
the mutation will become more common in offspring and increase the genetic variability in the gene pool.
genetic recombination is the only way that variations can be passed on, so the mutation will die out.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: