The probability of producing a phenotypically normal child by two parents who are carriers for an autosomal recessive disorder is

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When both parents are carriers of an autosomal recessive disorder, there is a 25% chance of having an affected child, a 50% chance of having a carrier child, and a 25% chance of having a child who is neither affected nor a carrier. Therefore, the probability of having a phenotypically normal child (either a carrier or not a carrier) is 75%.

The Probability of Producing a Phenotypically Normal Child by Two