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The Respiratory System Question
All of the following statements regarding cystic fibrosis are true except:
Incidence of 1 case per 3,500 black and 1 case per 17,000 white infants
Autosomal recessive inheritance
More than 700 gene mutations
F508 as the dominant mutation
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Explanation
The incidence of cystic fibrosis is highest in northern European whites (1 in 3500) and lowest in Asian infants in Hawaii (1 in 90,000).
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