In humans, cystic fibrosis is a recessive genetic disorder that results in mucus clogging major organs. If both parents are genetically heterozygous for cystic fibrosis, then what are their chances of having a child with the disease?

Question

Lainey Roth

Biology

18 March, 17:49

In humans, cystic fibrosis is a recessive genetic disorder that results in mucus clogging major organs. If both parents are genetically heterozygous for cystic fibrosis, then what are their chances of having a child with the disease?

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Charles Schmitt · Answer 1

25% since there's a 25% chance they'd be homozygous dominant (not have CF) and a 50% chance they'd be heterozygous dominant (not have CF) then the last 25% is the potential they'd be homozygous recessive (have CF)