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A new way to genetically tweak photosynthesis boosts plant growth. The search to understand the complex genetics of human sexuality has resulted in a better understanding of the process and development of better biomedical assessment methods and tools. Here are our predictions. It is one thing to discover the biological root of homosexual behaviour, and quite another to establish how this behaviour is perpetuated across generations. How the periodic table went from a sketch to an enduring masterpiece. Same-sex behavior has never completely supplanted heterosexual mating in any species studied, she says. The scientists identified four specific genetic variants that occur more often in people who had indicated responding to specially designed questionnaires that they had had same-sex sexual partners. The other two influence sex partner choice for both men and women.
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Accessed March 6, Some studies have seen pre-natal hormone exposures as the primary factor involved in determining sexual orientation. The message is loud and clear: It also quotes another neuroscientist, Simon LeVay, who previously claimed to have found a region in the brain to be smaller in gay men.
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