Cystic Fibrosis Is a Genetic Disorder in Homozygous Recessives That

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) fA₁) = 0.9700, fA₂) = 0.0300
B) fA₁) = 0.9997, fA₂) = 0.0003
C) fA₁) = 0.9604, fA₂) = 0.0392
D) fA₁) = 0.9800, fA₂) = 0.0200
E) fA₁) = 0.9600, fA₂) = 0.0400

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