From the pedigree, it can be known that Individual 3, being affected by cystic fibrosis, is a homozygous recessive for that trait. If we cross him with a carrier of the disease, the chances of the progeny is shown in the Punnet square below:
Look at the pedigree. If individual 3 marries a carrier for cystic fibrosis, what would be the chance of cystic fibrosis in their children?
A. 75% carrier, 25% cystic fibrosis
B. 25% normal, 50% carrier, 25% cystic fibrosis
C. 75% cystic fibrosis, 25% carrier
D. 50% carrier, 50% cystic fibrosis
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