yes. either you are born with a predetermined sexuality, or you aren't born with a predetermined sexuality.
what other options were you thinking of?
First of all, notice how this claim is entirely different than the presupposition of your earlier questions, which was that the only options were that you are either born gay or you choose to be (although, the way you begin with the word "yes" here implies that you are trying to pretend that this is just another way of saying the same thing).
Second of all, to answer this one, no, you aren't born with an entirely predetermined sexuality, although some people may be born with more of a predisposition to develop into homosexuals than others.
Two pretty important points that you disallowed by your two allegedly exhaustive options of either being born gay or choosing to be earlier in the discussion are:
1) that environment (such as how someone is raised) is a factor,
and
2) that behavior (including homosexuality) is determined by a combination of genetics, environment, and personal decisions, and not just one thing.
The scientific consensus is that both of those points are correct. The evidence is overwhelmingly against the claim that people are genetically predetermined to be gay, and that no other factors matter, as the APA and others have admitted for a long time now.
