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If two people are carriers for cystic fibrosis, what is the probability that they will have a child with cy?

Itri asked:


If two people are carriers for cystic fibrosis, what is the probability that they will have a child with cystic fibrosis?

Cystic Fibrosis

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One Response to “If two people are carriers for cystic fibrosis, what is the probability that they will have a child with cy?”

  1. Hedge Fund Software

    This is a genetic question that requires a Punett square. Cystic fibrosis is a recessive trait, meaning you need 2 alleles for cystic fibrosis to display it phenotypically. So if you define “a” as the allele for cystic fibrosis, “A” is the normal allele. A carrier of cystic fibrosis will have the genotype: Aa. If you do a Punett square, you’ll discover that there’s a 1/4 chance the child will have the aa genotype and will have cystic fibrosis.

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