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?

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Given that 9 in 10,000 newborn babies have cystic fibrosis, which is a recessive condition, we can calculate the frequency of the recessive allele (q^2) as 9/10,000 = 0.0009. Taking the square root gives q = 0.03. The frequency of the dominant allele (p) is 1 - q = 1 - 0.03 = 0.97. Therefore, the frequencies of the dominant and recessive alleles are 0.9700 and 0.0300, respectively.

Cystic Fibrosis Is a Genetic Disorder in Homozygous Recessives That