I asked when the genetics are FIRST determined.
You answered (I think correctly) that a human being's genetics "genetics start at conception."
Can you tell me why that (conception) is not indicative in any way of when and how a human being's "life begins?"
It is indicative of when
a "potential" human life begins (or several), it just doesn't make any difference when trying to work out at at what stages we grants rights to developing anything. Biology isn't the law, the law isn't biology.
Try this, I grant (for the sake of argument) that a brand new conception has the same rights of a fully grown human being. Then, the conception divides into twins. Are they half persons? Then it merges and we now have conjoined twins. That's one body so is it one life or two? Based on minds it's two, on bodies it's one. These are legal not biological debates.
Biology can't help you in this case.