waa maxay taran
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Taran waa habka bayooloji ee ay ku abuurmaan noole cusub, ha noqoto galmo ama galmo. Waa mid ka mid ah sifooyinka aasaasiga ah ee noolaha, taas oo u oggolaanaysa inay sii wataan noocyada iyo hubinta sii wadida nolosha.
Taranka galmada, walxaha hidde-sidaha ee labada waalid ayaa la isku daraa si ay u abuuraan isku-dhafka hidde-sidaha gaarka ah. Habkani wuxuu caadi ahaan ku lug leeyahay isku-dhafka shahwada iyo ukunta, wuxuuna ka dhici karaa gudaha ama dibadda iyadoo ku xiran noolaha.
Dhalmada jinsiga ah, faraca waxaa laga soo saaraa waalid keligiis ah iyada oo aan lug ku lahayn gametes (unugyada galmada). Tani waxay ku dhici kartaa siyaabo kala duwan, sida fission binary, gaysashada, ama kala qaybsanaan, taas oo ku xidhan noolaha. Dhalmada jinsiga ah waxay soo saartaa farac hidde ahaan la mid ah waalidka.
Dhalintu waa hannaan adag oo ay nidaamiyaan hormoonnada waxayna ku lug leeyihiin isbeddello jidheed iyo dabeecadeed oo kala duwan oo lab iyo dheddig ah.