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Multiple Alleles
Human Blood Types
Antigens
Blood Transfusion
Surgery, Trauma, Blood Disease
Universal Donor
Universal Recipient
Average Percents…
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•
•
•
Type O—46%
Type A—40%
Type B—10%
Type AB—4%
Genotypes
Phenotypes (Blood types)
IA IA
A
IAi
A
I BI B
B
IBi
B
IA IB
AB
ii
O
There are 3 alleles blood type: IA ,IB, i
For one gene, which has 2 alleles, there are 6 possible
posibilities
HUMAN BLOOD TYPES
•A - dominant over O
•B- dominant over O
•AB- codominant
•O- recessive
• In a maternity ward, four babies become
mixed up. The ABO types of the 4 babies
are O , B, A and AB. The ABO types of the
4 sets of parents are determined and the
pairs are written below. Indicate which
baby belongs to each set of parents.
– AB x O
–AxO
– A x AB
–OxO