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Natalija [7]
3 years ago
5

Cystic fibrosis is a recessive gene disorder. The pedigree chart for a family known to have cystic fibrosis is shown below.

Biology
2 answers:
ASHA 777 [7]3 years ago
4 0

Answer: I think the answer is d.

Hope this helps.

Explanation:

qwelly [4]3 years ago
3 0
75% because there are three AA's and 3out of 4 is 75


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