Albinism is a recessive disorder in which the skin and hair fail to produce pigment.The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism.The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.
-What is Bill's genotype?
A)NN
B)Nn
C)nn
D)Cannot be determined

Question

Albinism is a recessive disorder in which the skin and hair fail to produce pigment.The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism.The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder. 
-What is Bill's genotype?
A)NN 
B)Nn 
C)nn 
D)Cannot be determined

Quizplus · Accepted Answer

Since Bill does not express the disorder, he must have at least one dominant allele for normal pigmentation, which means he could either be NN or Nn. However, we cannot determine his exact genotype based on the information provided in the pedigree chart.

Albinism Is a Recessive Disorder in Which the Skin and Hair