If a set of heterozygote carrier parents (for cystic fibrosis) have a child, what is the probability that their child will be affected?
Added by Jonathan B.
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In this case, both parents are carriers of the cystic fibrosis gene, so their genotypes would be "Aa" (where "A" represents the normal allele and "a" represents the cystic fibrosis allele). Show more…
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