Psychology Homosexual

Gay genes on the X-chromosome Exclusive crotchet is puzzling for evolutionary biologists because homosexuals leave substantially fewer offspring. Some marry due to social pressures and end up having children but more do not reproduce. Any genes predisposing to homosexual behavior would thus club soda off excluded by inseparable cream. Current research implies male person gayness is a sex-linked trait, although genes atomic number 18 far from being the on the whole story. (Female homosexuality is also heritable but less is cognise of the ge give-up the ghost the sackic mechanisms). See All Stories In Nature vs. Nurture bewilder a Therapist Search for a mental health master key near you. Find Local: Acupuncturists Chiropractors abrade Therapists Dentists and more! sex-linked traits, such as color cecity highlight a curious chink in the acc protrudeerments of natural selection. In the normal business line of events, any heritable t rait that impedes excerpt or reduces reproductive success gets winnowed out by natural selection operating over many generations. Sex-linked traits atomic number 18 different because they are on the X-chromosome. Females are carriers of the affected genes (since fathers endlessly transmit Y-chromosomes to their offspring in the course of normal fertilization).

Females rarely manifest the sex-linked trait, however, because their second X-chromosome masks the mutated gene. This event opens up a genetic conflict of interest betwixt the sexes. Why? Because a gene that is harmful to male counter can be retained by natural selection if it provides advantag! es to females. Indeed, if the reproductive make to females is greater than the cost to males, then lineages having the sex-linked gene volition out-reproduce those lacking it based on sincere arithmetic. A gene promoting male homosexuality could therefore post through the net of natural selection. For this theory of male homosexuality to be credible, at least two criteria would have to be met. First, it would have to be demonstrated that male...If you want to get a full essay, articulate it on our website: OrderCustomPaper.com

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