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M-> C c F C CC Cc c Cc cc phenotype- 3:1 genotype- 1:2:1

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Q: When C equals normal allele and c equals allele for cystic fibrosis Set up and complete a Punnett Square for cystic fibrosis for a couple that both have heterozygous for cystic fibrosis with no sympt?
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What is the ratio of heterozygous offspring to total offspring in the punnett square


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