smutpen
Really Experienced
- Joined
- Feb 22, 2004
- Posts
- 117
thenry said:Not to burst the statistics bubble, but if given one gay twin and fifty percent odds of the other being gay it means there is exactly no chance of a gay gene. 50/50 odds signify random behavoir.
On the other hand, the low probability of the opposite being true (given one heterosexual twin, odds of the other being heterosexual) lead to a different hypothesis. That being a "gene" for heterosexuality that, when absent, allows for random determination.
Left-handedness statistically behaves the same way. A left-handed twin has a 50% chance of having a left-handed sibling. A right-handed twin has a 4% chance of having a left-handed sibling.
50/50 odds signify randomness only for a characteristic that is evenly distributed among the population.
Even if separately raised identical twins of gays had only a 30 or 40 percent chance of being gay, the figure would be statistically significant, because a random member of the population is far less than 30% likely to be homosexual.

