Blood types are based on the presence or absence of specific antigens on red blood cells; four blood types: A, B, AB, O

Blood Type …codominance and multiple alleles

Multiple alleles …More than two choices.

IA IB iIA IB i Type A B AB Universal Recipient O Universal Donor Genotype I A I A or I A i I B I B or I B i I A I B ii homozygous heterozygous

I A i x I A I B

I A i I A I B I A I A I B I B i I A i

Cross a man with blood type AB with a woman with blood type O.

How would you set it up?

IAIA IBIB i i

IAIA IBIB i i I B i I A i IA iIA i

Who did the blood banks? Charles Drew Why? Blood transfusions

If a son has blood has blood type O, could a man with blood B be his dad? If the mom has A? Punnett Square

What % chance does an A (I A i) and a B (I B i) man have of having an O child? 25%

Blood Type Practice Problems!