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Attached earlobe and cystic fibrosis are both autosomal recessive traits. A woman with attached earlobes, that...

Attached earlobe and cystic fibrosis are both autosomal recessive traits. A woman with attached earlobes, that is a carrier of cystic fibrosis, marries a man that is genotypically normal for cystic fibrosis and is a carrier of the attached earlobe trait. What is the probability that they will have a child with non-attached earlobes that is a carrier of cystic fibrosis?

A- 1/4

B-1/16

C-1/2

D-3/4

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