The pedigree below shows the inheritance pattern of an Xlink

The pedigree below shows the inheritance pattern of an X-linked recessive trait. Identify all the individuals in the pedigree that you know for certain must be carriers of the recessive allele.

2 0-1 CHO-D 23 234 5 8 7 6 Ho 6 5 d\'LO -1-03 12

Solution

Answer:

The followings are certainly carriers.

II-3, II-5, III-2, & III-3

But among III-4, III-6 & III-7, some of them are carriers and some of them are homozygous dominant.