Micro evolution is a change in gene frequency within a population caused by mutations, natural and artificial selection, genetic drift and gene flow. Micro evolution is basically evolution resulting from genetic changes which may lead to new sub-species. An easier way to describe micro evolution is this: When someone with specific traits successfully reproduces, the next generation will have more copies of that certain trait; If the trend continues then that trait will become so common in a population causing the population profile (a chart which shows the number of people as a function of their ages) to change.
Firstly, genetic variation is the variety of genes in a population. The first and ultimate way that genetic variation can occur is through mutations. This is because mutations change the order of nucleotide bases of DNA. The second way that variation occurs is from independent assortment, which is the recombination of chromosomes during reproduction. Lastly, the third way in which variation happens is from crossing over during meiosis. Crossing over may result in the production or new combinations of genes.
No comments:
Post a Comment