你会觉得同性恋天生论是有原因的

来源: tz2000 于 2013-01-10 14:07:59 [档案] [旧帖] [给我悄悄话] 本文已被阅读： 0 次 (21142 bytes)

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回答: 你凭什么证据说同性恋的成因环境因素多于基因因素？我读到的怎么overwhleming反过来？由 kozy 于 2013-01-10 11:54:19

从1973年或更早起，研究就在寻找同性恋遗传的证据，最接近的是Xq28(X染色体上的一段基因，Hamer1993),然而这个研究无法被后续的研究重复（Rice1999),而且有方法上的严重缺陷，他没有看同族的异性恋有没有相同的基因。到2003年人类基因组排序完成也没有发现G基因。

另外，同性恋们自己是这么认为的。金塞（Kinsey）有两个大型的调查（1940s and 1970s）,分别调查了1700个和979个同性恋。注意这个调查事件是在“gay right”运动发生之前。两个调查都表明绝大多数（overwhelmingly believe）相信他们的感觉和行为是社会和环境影响的结果。

各种环境影响的比重：

- early homosexual experience(s) with adults and/or peers - 22%
- homosexual friends/ around homosexuals a lot - 16%
- poor relationship with mother - 15%
- unusual development (was a sissy, artistic, couldn't get along with own sex, tom-boy, et cetera) - 15%
- poor relationship with father - 14%
- heterosexual partners unavailable - 12%
- social ineptitude - 9%
- born that way - 9%

这当中与父母的关系的原因共计41%。相信现在这种社会影响更甚。

近年的研究显示黑人男性同性恋比例是白人的两倍，比照黑人孩子有62%没有父亲vs白人17%

你会觉得同性恋天生论是有原因的，美国的媒体因为种种原因（政治正确，Liberal, 猎奇心理等等）倾向于夸大其词，片面报道。就像如果你只看报纸的话会以为只有人咬狗，不会狗咬人，：）

举例：Bailey and Pillard, 1991, “A Genetic Study of Male Sexual Orientation”的双胞胎研究，发现同性恋的52%的同卵双胞胎兄弟也是同性恋，22%的异卵双胞胎，11%的领养的兄弟，和9.2%亲生兄弟是同性恋。于是Science news说 “Our research shows that male sexual orientation is substantially genetic” (as quoted in Bower, 1992, 141:6）

But in fact: this statement contradicts against the data:

In nearly half of the twins studied, one brother was not homosexual.

More adoptive brothers shared homosexuality than non-twin biological brothers.

The fact that fraternal twins of gay men were roughly twice as likely to be gay as other biological brothers shows that environmental factors are involved, since fraternal twins are no more similar biologically than are other biological brothers. If being a fraternal twin exerts an environmental influence, it does not seem surprising that this should be even truer for identical twins, who the world thinks of as “the same” and treats accordingly, and who often share those feelings of sameness (Hubbard and Wald 1997, p. 97).

“Critical review shows the evidence favoring a biologic theory to be lacking” (Byne and Parsons 1993 50:228).

Commenting on Bailey and Pillard’s report, researchers Billings and Beckwith wrote:

While the authors interpreted their findings as evidence for a genetic basis for homosexuality, we think that the data in fact provide strong evidence for the influence of the environment (Billings and Beckwith 1993, p. 60).

但是，这些technical comments on "Science"不会出现在报纸上。