In the following human pedigrees, the filled symbols represent
the affected (remember that “affected” means suffering from the
disease) individuals. Use A / a to represent alleles for autosomal
traits, or XA / Xa / Y to represent alleles
for X-linked traits. Use the uppercase letter to represent the
dominant allele and the lowercase letter to represent the recessive
allele. If there are multiple possibilities, please choose the most
likely.

Pedigree 4: a) What is the most likely mode of inheritance of this disease? Choose from: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive. b) State the genotypes of individuals #1 #4. c) If individual #3 has another son with the same partner, what is the probability that he will be affected?





