Figure:

Question

Figure: 
-This figure shows a human pedigree.What is the genotype of the mother in this pedigree?
A)could be homozygous recessive or heterozygous 
B)heterozygous only 
C)homozygous recessive only 
D)homozygous dominant only 
E)could be homozygous dominant or heterozygous

Accepted Answer

Since two affected parents have non-affected children,this must be an autosomal dominant disorder.The two parents are heterozygous and the non-affected children are homozygous recessive.But the affected children could be either heterozygous or homozygous dominant.

Figure: -This figure shows a human pedigree.What is the genotype of the mother in this pedigree?

Figure:
-This figure shows a human pedigree.What is the genotype of the mother in this pedigree?