Albinism Is a Recessive Disorder in Which the Skin and Hair

question 21

Multiple Choice

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

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