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6 September, 10:28

Cystic fibrosis is a hereditary disease. The allele for cystic fibrosis is recessive. What does this mean?

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  1. 6 September, 12:30
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    Cystic fibrosis can be carried in a heterozygote and affect a homozygous offspring.
  2. 6 September, 14:02
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    Cystic fibrosis is an example of a recessive disease. That means a person must have a mutation in both copies of the CFTR gene to have CF. If someone has a mutation in only one copy of the CFTR gene and the other copy is normal, he or she does not have CF and is a CF carrier.
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