Question

-(PLEASE HELP)-

The symbols IA, IB, and i represent blood types A, B, and O respectively, where I stands for dominant and i stands for recessive. Which Punnett square represents the cross between a woman with both A and B antigens and a man that has neither A nor B antigens?

Answer 1

So I'm just going to use P, B, and N notation instead of IA, IB and i respectively. Not having P or B antigens means the man has type N.         P   B N   PN   BNN   PN   BN So 50% offspring have type P and 50% have type B