The Four Forces Of Evolution And Natural Selection

The four forces of evolution are mutation, natural selection, genetic drift, and gene flow. Mutations are the only force that can change the genetic code and without them the other forces wouldn’t happen. When a mutation takes place in a sex cell, it can them be passed down through generations. Natural selection was first brought about by Charles Darwin. It is the belief that the better an organism adapts to their environment, the more likely they are to live longer as well as reproduce. Genetic flow is the spreading of genetic material between populations of the same species. Finally, genetic drift is a random change in various gene forms. Genetic drift affects smaller populations more than large ones.

Sickle-cell anemia is a blood disease