Natural selection occurs when individuals with certain ... as that genotype increases in frequency (i.e., if there is negative frequency-dependent selection). It is important to note that ...

indicating that they have been under negative selective pressure. However, the findings additionally showed that natural selection has also selected for SNPs that alter amino acids. The ...

The phrase "survival of the fittest" functions principally in evolutionary theory to describe the biological concept of natural selection. English naturalist, geologist, and biologist Charles ...