thishereboi
Posts: 14463
Joined: 6/19/2008 Status: offline
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quote:
ORIGINAL: Carmeldelight An examination of family pedigrees revealed that gay men had more homosexual male relatives through maternal than through paternal lineages, suggesting a linkage to the X chromosome. Dean Hamer23 found such an association at region Xq28. If male sexual orientation was influenced by a gene on Xq28, then gay brothers should share more than 50% of their alleles at this region, whereas their heterosexual brothers should share less than 50% of their alleles. In the absence of such an association, then both types of brothers should display 50% allele sharing. An analysis of 40 pairs of gay brothers and found that they shared 82% of their alleles in the Xq28 region, which was much greater than the 50% allele sharing that would be expected by chance.24 However, a follow-up study by the same research group, using 32 pairs of gay brothers and found only 67% allele sharing, which was much closer to the 50% expected by chance.25 Attempts by Rice et al. to repeat the Hamer study resulted in only 46% allele sharing, insignificantly different from chance, contradicting the Hamer results.26 At the same time, an unpublished study by Alan Sanders (University of Chicago) corroborated the Rice results.27 Ultimately, no gene or gene product from the Xq28 region was ever identified that affected sexual orientation. When Jonathan Marks (an evolutionary biologist) asked Hamer what percentage of homosexuality he thought his results explained, his answer was that he thought it explained 5% of male homosexuality. Marks' response was, "There is no science other than behavioral genetics in which you can leave 97.5% of a phenomenon unexplained and get headlines."28 Sexual preference or orientation? If homosexual orientation were completely genetic, one would expect that it would not change over the course of one's life. For females, sexual preference does seem to change over time. A 5-year study of lesbians found that over a quarter of these women relinquished their lesbian/bisexual identities during this period: half reclaimed heterosexual identities and half gave up all identity labels.29 In a survey of young minority women (16-23 years of age), half of the participants changed their sexual identities more than once during the two-year survey period.30 In another study of subjects who were recruited from organizations that serve lesbian/gay/bisexual youths (ages 14 to 21 years) in New York City, the percentage that changed from a lesbian/gay/bisexual orientation to a heterosexual orientation was 5% over the period of just 12 months (the length of the survey).31 Other studies have confirmed that sexual orientation is not fixed in all individuals, but can change over time, especially in women.32 A recent example of an orientation change occurred with The Advocate's "Person of the Year" for 2005. Kerry Pacer was the youngest gay advocate, chosen for her initiation of a "gay-straight alliance" at White County High School in Cleveland, Georgia. However, four years later, she is raising her one year old daughter, along with the baby's father.33 Obviously, for at least some individuals, being gay or straight is something they can choose. It always amazes me when people say that they were born gay. Looking back on my own experience, I would never say that I was "born straight." I really didn't have any interest in females until about the seventh grade. Before that time, they weren't really interesting, since they weren't interested in sports or riding bikes or anything else I liked to do. Homosexuality and Darwinism I am not a huge fan of Neo Darwinian evolution. Nevertheless, there is some clear evidence that natural selection (and sexual selection) does act upon populations and has acted on our own species to produce racial differences.34 Natural selection postulates that those genetic mutations that favor survival and reproduction will be selected, whereas those that compromise survival and reproduction will be eliminated. Obviously, a gene or series of genes that produce non-reproducing individuals (i.e., those who express pure homosexual behavior) will be rapidly eliminated from any population. So, it would be expected that any "gay gene" would be efficiently removed from a population. However, it is possible that a gene favoring male homosexuality could "hide" within the human genome if it were located on the X-chromosome, where it could be carried by reproducing females, and not be subject to negative selection by non-reproducing males. In order to survive, the gene(s) would be expected to be associated with higher reproductive capacity in women who carry it (compensating for the generation of non-reproducing males). I can't imagine a genetic scenario in which female homosexuality would ever persist within a population. So what whackjob did you steal that from? And is plagiarism ok with your god?
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"Sweetie, you're wasting your gum" .. Albert This here is the boi formerly known as orfunboi
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