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Originally Posted by MissBrattified
In the case of the twins I mentioned, only the twins were gay. They had two brothers who were heterosexual. Four boys, raised in the same environment, two are straight, the twins are homosexual.
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They removed homosexuality and neurosis from the DSM II and IV. Twin studies are all vaery important. Twins are dress the same, look the same and play wuith each other. They have most nearly identical environments and temperaments. This gay feature should run 100% identical.
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More than 70 percent of the depressed twins had alcohol problems at some time in their lives, as did 67 percent of the nondepressed twins. In twin pairs where neither had depression, the lifetime rate of alcohol abuse or dependence was 53 percent. Those rates are much higher than in the general population, where the prevalence of alcohol problems is closer to 30 percent.
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http://wupa.wustl.edu/record_archive...0-97/1026.html
A study of identical twins showed that a twin will develop clinical depression more than 75 percent of the time if the other has been diagnosed.
If raised appart, it runs 67%
http://www.allaboutdepression.com/cau_03.html
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