Genetic diversity
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Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species. It is distinguished from genetic variability, which describes the tendency of genetic characteristics to vary.
Varieties of maize in the office of the Russian plant geneticist Nikolai Vavilov
A Tanzanian cheetah.
Photomontage of planktonic organisms.
Population genetics
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Population genetics is a subfield of genetics that deals with genetic differences within and among populations, and is a part of evolutionary biology. Studies in this branch of biology examine such phenomena as adaptation, speciation, and population structure.
The typical white-bodied form of the peppered moth
Industrial melanism: the black-bodied form of the peppered moth appeared in polluted areas.
Drosophila melanogaster
The Great Wall of China is an obstacle to gene flow of some terrestrial species.