What is Genetic Variance?
Genetic variance is the result of several factors, leading to the evolution of a species. It is influenced by several main criteria, including genetic mutation, the genetic elimination of recessive characteristics and addition of dominant ones, and the size of the available gene pool. Genetic variance can cause differences at an observable or phenotypic level in species, leading to explanations for things such as blood type, skin color and size. In humans and similar organisms, the genetic code carries a pair of each type of gene. The two components, called alleles, may be identical or different from one another, and are often characterized as dominant or recessive. For instance, if a person has brown eyes, they have at least one brown-eye causing allele, because brown eye color is a dominant trait. Because blue eyes are a recessive trait, a blue-eyed person has identical blue-eye causing alleles. While that seems somewhat straightforward, the science of genetic variance quickly become
