Cystic fibrosis is a genetic disorder in homozygous recessives that causes death during the teenage years. If 9 in 10,000 newborn babies have the disease, what are the expected frequencies of the dominant (A1) and recessive (A2) alleles according to the Hardy-Weinberg model?

Cystic fibrosis is a genetic disorder in homozygous recessives that causes death during the teenage years. If 9 in 10,000 newborn babies have the disease, what are the expected frequencies of the dominant (A1) and recessive (A2) alleles according to the Hardy-Weinberg model?


a. f(A1) = 0.9700, f(A2) = 0.0300

b. f(A1) = 0.9997, f(A2) = 0.0003

c. f(A1) = 0.9600, f(A2) = 0.0400

d. f(A1) = 0.9800, f(A2) = 0.0200

e. f(A1) = 0.9604, f(A2) = 0.0392



Answer: A


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