Question

A man with a rare Mendelian disorder has a father and grandmother who

are also affected. No one else in his family, including his two children, is
affected.
What does this indicate about the inheritance of the disorder?

Answer 1

the children took more of their mother's genes

Step-by-step explanation:

when a zygote is being formed 50% of the males genes and 50% of the female genes are added to make a 100% gene.So the children must have taken more of their mother's genes than that of their father.