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Thread: Biologija

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    It was a business doing pleasure with you

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    Zanimljivo pitanje za evolutivne biologe je zašto homoseksualizam ne izumire evolutivnim procesom već se persistentno zadržava. Naime preko 1500 zabilježenih vrsta posjeduje jedinke sa takvim sklonostima. Međutim homoseksualizam ne stvara potomstvo tako da bi prema zakonitostima prirodnog odabiranja ta manja devijacija u ponašanju trebala izumrjeti pogotovu jer postoji jaki genetski uticaj.

    Međutim biolozi su izgleda pronašli odgovor barem u slučaju drozofila (vinskih mušica).

    Naime genetski uticaj koji stvara homoseksualizam takođe povećava i fertilitet. Paradoksalno geni koji su štetni u mužjaka jer sprječavaju parenje sa ženkama u ženkama povećavaju fertilitet i samim time broj potomaka. U ovom slučaju postoji jasna evolutivna prednost.

    http://www.iflscience.com/plants-and...homosexual-sex

    http://rspb.royalsocietypublishing.o.../1809/20150429

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