A sizable population was analyzed for SNPs in a certain DNA region and found all four possible variants at the following frequencies: SNP 1: GGTCTAGGA; frequency = 0.91 SNP 2: GGTGTAGGA; frequency = 0.03 SNP 3: GGTATAGGA; frequency = 0.03 SNP 4: GGTTTAGGA; frequency = 0.03 What is the total frequency of heterozygotes at this SNP locus?
A) 0.009
B) 0.0018
C) 0.170
D) 0.828
E) 0.055
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