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Human ABO Blood Groups Are Determined by a Single Gene

Question 26

Multiple Choice

Human ABO blood groups are determined by a single gene with 3 alleles: A, B, and O. In a sample of 300 individuals, 100 are blood type A and genotype AA, 100 are blood type B and genotype BO, and 100 are blood type O and genotype OO. What are the allele frequencies?


A) 33.3% A, 33.3% B, 33.3% O
B) 33.3% A, 33.3% B, 66.6% O
C) 33.3% A, 16.6% B, 50% O
D) 25% A, 25% B, 50% O
E) 50% A, 25% B, 25% O

Correct Answer:

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