Look at the pedigree below, does anyone in the 4th generation have cystic fibrosis?
A No
B Yes, just Child 2
C Yes, Child 1 & 2
D Yes, Child 3
E Yes, just Child 1

Look at the pedigree below does anyone in the 4th generation have cystic fibrosis A No B Yes just Child 2 C Yes Child 1 amp 2 D Yes Child 3 E Yes just Child 1 class=