People who are lactose intolerant
A. produce inactive lactase.
B. have a genetic polymorphism of the lactase gene that turns off lactase production after weaning.
C. must drink soy (non-dairy) formula as infants.
D. have a mutation in the promoter region of the lactase gene.
E. have mutations in regulatory regions of the lactase gene.
B. have a genetic polymorphism of the lactase gene that turns off lactase production after weaning.
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Fill in the blank(s) with the appropriate word(s).
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