Respond, please on such question at me congenital absence of a brush of arms or hand...

[Maxim]

Respond, please to such question at me congenital absence of a brush of an arm or a hand, at my ancestors on how much I know anything similar was not, but 100 % cannot tell or say t. To. Further than the great-grandmother and the great-grandfather the information I do not own
I wish to learn or find out what probability of occurrence of similar deviations or rejections from my children and if such probability is as it is possible to reduce or avoid it or her.
Thanks.

[The expert]

You chyo, the fool? You think of what else children? Forget! By the way, you a nose, chto-l, printed? Or to IT or HIM;THEM?
And from bottles you too IT or HIM unscrew fuses?