The fundamental structural and operational component of heredity is a gene.
DNA is the component of genes.
Some genes serve as instructions for creating proteins.
The human gene pool demonstrates to be the primary level of evolution.
Variation in the gene pool results in the emergence of new species.
According to a recent study, which claims that humans are still evolving in accordance with Charles Darwin's theory of natural selection, humans are becoming weaker, more susceptible to disease, and possibly even adopting some manners.