Genetic recombination is more complicated than this. You also have to factor in the age of the parents. It's been proven that older parents have kids with lower IQs and are far more likely to have a kid with a mental illness or deformity. Sperm degrades in quality just like eggs do. So it's likely this has an effect on looks as well.
But like i said, genetic recombination is too much of a wild card to think that a certain combination of parents can reliably produce a certain outcome.
I think having a child is like playing Russian roulette. Variables like genetic quality of the parents and age of the parents determine how many bullets are in how many bullets are in the chamber, but there will always be at least ONE bullet in there. And likewise even if the chamber is fully loaded, a miracle could happen and the gun could jam, but at that point the odds are bad enough that the outcome is almost guaranteed.
That being said, 2 unattractive parents could potentially have a good looking son. For example, a tall high T ogre with a horse midface, and massive nose (eg someone like me) could have an attractive son with a woman with a squished up midface and a bad lower jaw. The two could balance each other out. Of course no woman WOULD have a child with a tall high T ogre, just like a tall high T ogre woman wouldn't have a child with a low T manlet even though they could (potentially) have attractive children because of the same logic. Of course in either case they could have a son who has the negative traits of both parents and ends up a part of the incel.is mod team of 2045.