Not according to Unruh. For example, he drags out another "expert:"
Douglas Abbott, a University of Nebraska professor, concluded, "If homosexuality was caused by genetic mechanisms, their children would be more likely to choose same-sex interaction. But they aren't more likely, so therefore it can't be genetic."
Unruh's point is clear and obvious. Whether it's correct is another matter.
Second, you are clearly not familiar with the actual meaning of the terms genetic component, gay gene and genetics.
There is no evidence or research that claims homosexuality is genetic. There is no genetic test, experimental or otherwise that can determine one's sexual orientation.
Douglas Abbott, a University of Nebraska professor, concluded, "If homosexuality was caused by genetic mechanisms, their children would be more likely to choose same-sex interaction. But they aren't more likely, so therefore it can't be genetic." Unruh's point is clear and obvious. Whether it's correct is another matter.
When Douglas Abbot says "caused by genetic mechanisms" he is referring to a one-to-one correspondence between genetics and, in this case, sexuality. There is no one-to-one correspondence between sexuality and genetics, therefore, in context, "it can't be genetic." It is really quite simple.