A genetic locus that is analyzed in many forensic and paternity testing laboratories is the human leukocyte antigen locus known as HLA-DQ alpha. There are four major alleles at this locus known as 1, 2, 3, and 4. How many different genotypes are possible for these four alleles?

A. 8

B. 10

C. 12

D. 16

E. 24

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Tuesday, August 20, 1996
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