And the choir, I believe, agrees with you.
Was there ever a diagnosis for your dear dad’s hearing loss (was he once able to hear and lost it or was it always lost). Genetics is moving forward in leaps and bounds. I am, SADLY, a carrier, for x-linked juvenile retinoschisis , and even sadder still, my second son is afflicted with it. But in the earlier days when my cousin was first in the family to be diagnosed, little if anything was known about it. But now they have done a lot with genetic studies and discovered they how it is passed on by and to-whom. They have done testing on various drugs via eyedrops to improve the outlook and there is ongoing investigation involving gene transplants.
My cousin who was originally diagnosed is now 67 years old but in his lifetime much has been learned. But always the disease becomes apparent at a very young age, as in my cousin and my son, about 7 years old (the news heartbreaking). Meanwhile, carrier females are still unknowingly passing it on to their children.
So I’m wondering if there isn’t some similar studies for your father and yourself and family?