So there's this topic on ectobiology saying that ((for example)) dave is a guy because dirk is a guy and that it's impossible for one of them to be born a girl because of the genetics in ectobiology, but that doesn't make much sense to me. How do you see this ectobiology process in accordance to the topic?

That topic is using faulty logic because

1: it’s assuming genetics influence gender which isn’t always necessarily true and

2: Dave’s not a clone of Dirk, he’s got Roxy’s dna too.