Genetics Pedigree Analysis:

A) Draw all possible conclusions concerning the mode of
inheritance of the trait expressed in the pedigree below. Explain
why it could be Autosomal Dominant/Recessive and X-linked Dominant
Recessive.

B)Given the most probable mode of inheritance, what is the
probability II-8 & II-9 is unaffected?

C) If the first child is affected, II-8 and II-9 have 3 more
children, then indicate the probability that at least one child is
affected?