Can we predict that natural selection will weed out genetic disease over time? Sickle-cell trait haplotype distribution shows the genetic advantages of this mutation. read more
Sickle cells are an advantage where there is endemic malaria. Natural selection had resulted in the spread of the gene. In the 15th and 15th centuries the Portugese brought a lot of African slaves to Portugal. read more
Darwin surmised that the environment operated in a selective way, reducing the number of poorer-adapted variants of a species while increasing the proportion of better-adapted ones. This process became known as natural selection. Darwin correctly understood that natural selection is usually the most powerful mechanism of evolution. read more