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Originally Posted by RCAlyra2004
The genetic scans showed a clustering of the same genetic pattern among the gay men on three chromosomes -- chromosomes 7, 8, and 10. These common genetic patterns were shared by 60% of the gay men in the study. This is more than the 50% expected by chance alone.
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This 10% diffference didn't look statistically significant to me, so I wondered why they even reported it, until I realized that your math is a little off. First of all, the genes in question were fround in 60% of gay BROTHERS, not just any men. If that was the case the expected rate would be way less than 50% (like... powers of 10 kind of less). Since they are brothers, the probability of BOTH of them having the gene by chance is 25%, not 50%. The probability of either of them having the gene is 50%, and there's 2 of them.
For those questioning the integrity of the reporting or the research... You can look up Brian Mustanski on the
University of Illonois at Chicago directory and the story appeared today in
BBC News. Whether it gets disproved, who knows? I don't do behavioral neuroscience.