Very interesting ethical, moral, legal issue!

New Zealand fertility clinic now accepts sperm donations from gay men, in response to accusations of discrimination. Yay! But now a local academic says recipients should be warned of their baby's increased likelihood to be gay, due to the "gay gene". Boo?
I find it incredibly interesting that the gay group spokesman poo poos a genetic predisposition towards homosexuality - I think the "gay gene" argument strongly supports the essentialist approach to sexual orientation, which seems to have been a fundamental tenet of mainstream gay rights organisations. What is he saying? He chose to be gay? Or something else, something not genetic, has directed his essential makeup?
Also very interesting is the point that other possible genetic variations are warned about, so why not this one? Is the issue that it's being treated as a "defect"? Is it good or bad that would-be parents could have a choice about whether their child has a greater or lesser chance of being gay? Would gay-friendly people, given the choice, really, actively choose to give birth to a child they believed was more likely to be gay? Or would they think, "life for gays is hard. We will give our baby the highest chance of a happy life." Would *gay people*? I always remember a gay man I know, who is a parent, saying that if his children grow up to be gay he will naturally be the best dad possible, having been through it himself, but that really he hopes they don't.
Fascinating and thorny subject.