Nyere dzemuviri wemunhu dzine mapeya etsatsimuvara makumi maviri nambiri (22), dzoita tsatsimuvara mbiri dzekushara chipandarudzi - sex/gender. Kune idzo dziri pahuviri, rimwe divi rinobva kuna baba, rimwe divi richibva kuna Amai vemunhu. Tsatsimuvara tingadzidudzira serurebvu rwakamonana runosenga mbara (genes) hwakarongeka huri parundaza. Idzo mbari dzakatakura nhaka yemuropa inobva kuna baba naAmai vemunhu.