Hey I received proposal from a guy whose parents are deaf His father having 3 brother n 1 sister 1 uncle is deaf 3 number means the boys father also deaf.remaining are normal. The first uncle having 3 children 2 girls n 1 boy now the boy is deaf but sisters are ok.the boy who is deaf his child can speak....the other uncles children can speak well the boy whose proposal I received also ok.now I want to is deaf can come in hereditary or not? I like the guy very much but m confused what should I do? Please answer