Muvanhu, semuenzaniso, ruvara rwemaziso chinhu chinogarwa nhaka uye mumwe munhu anogona kugara nhaka "hunhu hwekunze-maziso" kubva kune mumwe wevabereki vavo. Hunhu hunogarwa nhaka hunodzorwa nemajini uye seti yakazara yemajini mukati mejenomu rechisikwa (genetic material) inonzi genotype yayo. Seti yakazara yezvinhu zvinoonekwa zvinoumba chimiro uye maitiro echisikwa inonzi phenotype yayo. Hunhu uhwu hunouya kubva mukudyidzana kwegenotype yayo nenzvimbo. Nekuda kweizvozvo, zvinhu zvakawanda zveiyo phenotype yechisikwa hazvipi nhaka. Semuenzaniso, ganda rakatsvuka rinouya kubva mukudyidzana pakati pemunhu uye genotype yezuva; nekudaro, maantigen haapfuudzirwe kune vamwe vanhu. Nekudaro, kana hunhu hunogarwa nhaka hunodzorwa nemajini uye seti yakazara yemajini mukati mejenomu rechisikwa (genetic material) inonzi genotype yayo. Seti yakazara yezvinhu zvinoonekwa zvinoumba chimiro uye maitiro anoonekwa anoitika mukati mechikamuta chimwechete cheDNA.
zvizvarwa zvinotevera