Answers are
Q 20
? = xBxb
Q 21
Mother
Q 22
In sex linked pedigree one gender is more effected than other But in Autosomal both Male and Female are effected equally
Q 23
Presence of just 1 Dominant autosomal allele is Sufficient
Q 24
Yes, All 3 children genotype will be Hh
All should be shaded because all are effected due to Presence of H