The probability of two heterozygous parents?

What is the probability of two healthy people where one is a carrier being parents to a child born with cystic fibrosis?

  • Answer:

    If only one person is a carrier of cystic fibrosis than there is no chance of having a child with it. Both parents have to be carriers and even then there is only a 25% chance. If only one carries than there is a 50% chance that their children will carry but will not have cystic fibrosis.

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