Quote Originally Posted by hungba View Post
There is no reason to. Neither parent were visuals, so if this is reproducible genetically, then the parents are both 100% hets. Whatever the father has, the mother has. The son has the visual homozygous form, so I use him over the father. The sisters would be 66% hets, so the mother is better.
Unless it was a spontaneous mutation that neither parent carried the coding for... Okay that's probably not what happened, I'm just playing devil's advocate here lol. You are right that breeding back to a parent would yield the best results. It would be interesting if it were a new mutation but not likely. Are the parents related, by any chance?