bcspace wrote:Conversely, evolution could prove homosexuality not genetic or otherwise inborn.
That's slightly less ridiculous than what Rick Warren said, but it is based on the same simplistic understanding of genes and reproduction. But at least you are leaving it there and not trying to elevate it into a disproof of evolution.
Here is the problem:
You think homosexuality cannot be genetic because it would not persist in the human population. But the same genes that would seem bad for reproduction when present in homosexuals of one gender could enhance reproduction when present in heterosexuals of the opposite gender. The sum effect determines how well a gene persists in the population. There is evidence for heritable androphilia that affects homosexual behavior in males but enhances child bearing in females.
Yong Xi must be right about what Rick Warren thinks. If homosexuality
is genetic and only has a negative impact on reproductive behavior of gays (which is naïve and demonstrably false), then natural selection should have culled it from the gene pool a long time ago. This appears to be incompatible with evolution (only with respect to this gene, by the way), but how then does the gay gene persist? Why, it must be constantly created anew by the intelligent designer. Or possibly by a conspiracy of gay OB/GYNs with control over their patients' DNA. (That's probably what Jeremiah Wright thinks.)