In counseling a couple when the man has sickle cell disease, an autosomal-recessive disorder, and the woman has no gene for sickle cell disease, the nurse uses Punnett squares to show the couple that the probability of them having a child with sickle cell disease is

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When one parent has no gene for an autosomal-recessive disorder, the children will not display the characteristics of the disorder, although the children will be carriers of sickle cell trait.

In Counseling a Couple When the Man Has Sickle Cell