Genetic testing reveals that an African American man and woman who are engaged to be married are both carriers of the gene that causes sickle cell disease
When planning this couple's follow-up counseling, the nurse should recognize what implication of this assessment finding?
A) There is a 25% chance that a child of the couple would have sickle cell disease.
B) The man and woman each have an increased risk of developing sickle cell disease later in life.
C) There is 50% risk of sickle cell disease for each of the couple's children.
D) Their children's risk of sickle cell disease will depend on a combination of genetics and lifestyle factors.
Ans: A
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Sickle cell anemia follows an autosomal recessive pattern of inheritance. When carriers have children together, there is a 25% chance that each child may inherit the gene mutation from both parents and have the condition. Lifestyle factors do not directly influence mendelian patterns of inheritance. The man and woman do not have a risk of developing sickle cell disease later in life.
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