How should the nurse respond when the parents of a child with cystic fibrosis ask how their male child inherited this autosomal recessive disorder when neither parent has the disease?
A) "Two carriers may pass on the mutation to their child."
B) "The disease often skips a generation."
C) "The gene for this disorder is on the Y chromosome."
D) "Are you sure there is no history of cystic fibrosis in either family?"
A) "Two carriers may pass on the mutation to their child."
Explanation: A) Often in an autosomal recessive condition, such as cystic fibrosis, there is not a family history of the condition. The disease occurs only when two carriers have a child together, and both carriers pass on the mutation to that child.
B) Often in an autosomal recessive condition, such as cystic fibrosis, there is not a family history of the condition. The disease occurs only when two carriers have a child together, and both carriers pass on the mutation to that child. The disease does not skip a generation.
C) The disorder is not sex-linked.
D) Often in an autosomal recessive condition, such as cystic fibrosis, there is not a family history of the condition. The disease occurs only when two carriers have a child together, and both carriers pass on the mutation to that child.
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