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Biology, 02.10.2020 14:01 jjj1931

Joshua and Bella have a son named Ian. Ian has been diagnosed with cystic fibrosis (CF).
Joshua and Bella are both healthy.
Bella’s parents are both healthy.
Joshua’s parents are both healthy.
Joshua’s sister, Sara, has cystic fibrosis.

If Josh also has a brother. What is the probability that he has cystic fibrosis? Explain with words and use of Punnett squares.

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Joshua and Bella have a son named Ian. Ian has been diagnosed with cystic fibrosis (CF).
Josh...

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