It's from the X chromosome, so speaking entirely in terms of sex, that means the mother had it and inherited it from their mother or father or both. If it was their mother, then uncles would have either a 50:50 or 100% chance of having it. If it was their father, then the father would definitely have it.
So look at maternal grandpa and uncles. Again, entirely by sex, not gender.
I thought it was maternal grandparents rather than uncles? If it is indeed uncles, ty for the good news!
It's from the X chromosome, so speaking entirely in terms of sex, that means the mother had it and inherited it from their mother or father or both. If it was their mother, then uncles would have either a 50:50 or 100% chance of having it. If it was their father, then the father would definitely have it.
So look at maternal grandpa and uncles. Again, entirely by sex, not gender.