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09 Jun 2010
Dr Kevin Mitchell investigates developmental neurognetics at the Smurfit Institute of Genetics at Trinity College, and he has an interesting blog post on the research into the genetic effects on sexual orientation.
This assumption reflects a common idea that heterosexuality represents the same default state in both males and females - that it is the "normal", baseline condition, one that requires no active processes. In fact, there is not a single rule: "be attracted to members of the opposite sex" - there are two rules: either be attracted to males or be attracted to females. These "rules" are embodied in anatomical and physiological differences in neural circuitry controlling sexual desire and behaviour, which differ between heterosexual males and females. Understanding that both these behavioural rules require active and possibly distinct neurodevelopmental processes to establish makes it much easier to appreciate how alterations to those processes can lead to exceptions to how those rules are expressed.
Read the rest.
(thanks Graham)
science
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ideas
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biology
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homosexuality
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nerd break
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