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Evolution of sex 2

Same sex

TermDefinition
melanesia 10-20% societies require men to participate in same same sex behavior
Sambia Sexual culture homoerotic insemination is part of the manhood ritual for Sambian boys
Kin Selection lineages gain reproductive advantage through offspring care provided by homosexual members.
Parental Manipulation Children are manipulated by parents to forgo reproduction, be celibate or have same sex sex and assist with offspring of relatives. ex. dominant female meerkats she hormonally forces daughters to be celibate.
Direct positive selection Direct positive selection for same sex sexual behavior occurs because of its non conceptive benefits. Maintenance of same sex alliances aid in resource competition or cooperative defense. It is a survival strategy not a reproductive strategy.
Influence of Genes small proportion if there are twins there is a better chance that the other twin will be homosexual as well.
Hormones Inconclusive
Environment there is more evidence. The more boys born means more boys are homosexual. When you only have opportunity to have sex with same and not heterosexual ex. prison, military
Created by: karinakll
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