[quote]terribleivan wrote:
You are attempting to prove a point that cannot be proven or disproven, so it has absolutely no relevence.[/quote]
Actually, I’m simply sharing with you the scientific conclusions of EVERY MAJOR MEDICAL AND MENTAL HEALTH ORGANIZATION IN THE WORLD.
To which, you have absolutely no response except the limp statement that “all of them must be biased!”
Lol.
Will you actually read it this time?
In 1990, researchers at McMaster University in Ontario, Canada examined the occurrence of left-handedness in heterosexual and homosexual women. Brain organization in left-handed people is known to be slightly different than in right-handed people. For example, left-handed people tend to have their language area centered in the right hemisphere of their brain; it is generally accepted that the area for language is in the left hemisphere. Even though only thirty-five percent of the general population is totally left-handed, the scientists found that sixty-nine percent of homosexual women were totally left-handed . As a result, they suggested that homosexuals have a different brain organization than heterosexuals. Referring to studies in which women with higher than normal levels of masculinizing hormones such as testosterone were more likely to be left-handed and gay, they hypothesized that atypical sex hormone levels during pregnancy may have affected lesbians? early fetal development.
In 1994, Hall and Kimura studied the fingerprint ridges heterosexuals and homosexuals. After the sixteenth week of pregnancy, fingerprints are known to be unchangeable, so if there were any significant fingerprint differences in the two groups, one could argue that sexual orientation may be determined before birth. In fact, Hall and Kimura did find that the difference between the number of ridges on the left hands of homosexual men was greater than that of heterosexuals. Citing that individuals with higher left-hand ridge counts perform differently on sexually dimorphic cognitive tasks than do those with higher right-hand ridge counts, the researchers concluded that there must be an ?early biological contribution to adult sexual orientation?.
Twin studies
In 1991, Bailey and Pillard studied three all male groups: identical twins, fraternal twins, and men with adoptive brothers.Of the 170 relatives examined, 52% of the identical twins were both gay, 22% of fraternal twins were both gay, and 11% of the adoptive brothers were both gay.
In 1992, Bailey and Pillard followed-up their experiment on homosexual men by studying identical twin, fraternal twin, and nongenetically related adopted sisters. As expected, their results mirrored those found in their gay brother study. Whereas only six percent of adopted sisters were both lesbian, sixteen percent of fraternal twin sisters and forty-eight percent of identical twin sisters were both lesbian . Clearly, the basis for a similar argument for predetermined homosexuality in women has been laid.
In 1993, Whitam, Diamond, & Martin found that 65% of identical twins were both gay, whereas only 29% of fraternal twins were gay.
Genetic differences
In 2004, Camperio-Ciani studied 98 homosexual and 100 heterosexual men and their relatives, which included more than 4,600 people overall. The female relatives on the mother’s side of the homosexual men tended to have more offspring than the female relatives on the father’s side. This suggests that women who pass on the gay trait to their male offspring are also more fertile. In comparison, the female relatives on both the mother’s and the father’s side of the heterosexual men did not appear to be as fertile, having fewer offspring.
In 2006, research published in the journal ?Human Genetics? found that the genetics of mothers of multiple gay sons act differently than those of other women. Scientists looked at 97 mothers of gay sons and 103 mothers without gay sons to see if there was any difference in how they handled their X chromosomes. They found that almost one fourth of the mothers who had more than one gay son processed X chromosomes in their bodies in the same way. Normally, women randomly process the chromosomes in one of two ways – half go one way, half go the other. The research “confirms that there is a strong genetic basis for sexual orientation, and that for some gay men, genes on the X chromosome are involved,” said study co-author Sven Bocklandt, a postdoctoral researcher at the University of California at Los Angeles. “When we looked at women who have gay kids, in those with more than one gay son, we saw a quarter of them inactivate the same X in virtually every cell we checked,” Bocklandt said. “That’s extremely unusual.”