What is Cystic Fibrosis?

Homework GCSE piece - Biology. B1- You and Your Genes. OCR 21st Century. 2011 spec. Hope it helps.

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Cystic Fibrosis
Cystic Fibrosis is an inherited disease, which is
not contagious. It affects the internal organs,
especially the lungs and digestive system, by
clogging them with thick, sticky mucus. This
makes it hard to breathe and digest food. Only
half of those living with Cystic Fibrosis are likely
to live past their late 30s.
Cystic Fibrosis occurs when they inherit two
mutated CFTR genes, one from each parent.
GG: normal no connection with cystic fibrosis.
Gg: carrier of cystic fibrosis.
gg: cystic fibrosis positive.
If two parents, who are both carriers of cystic
fibrosis, there is a 25% chance their child will two
defective genes (gg), a 25% chance their child
will inherit two normal genes (GG) and a 50%
chance that their child will be an unaffected
carrier of the disease (Gg).

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