BLOOD TYPES.

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Presentation transcript:

BLOOD TYPES

Even animals have blood types 1901 - Austrian Karl Landsteiner discovered human blood groups Even animals have blood types

Blood Type is Controlled by 3 Alleles 4 Possible Blood Types Alleles: A, B, O A & B are codominant O is recessive

Genotypes

Consider Both Parents Type A (genotype AA) x Type O (genotype OO)

Blood Type Antigens

Blood that has antigens on it that is not recognized by the body will be attacked by your immune system AB is the Universal Acceptor O is the Universal Donor

Rh Factor A person can either be Rh + or Rh – (positive is dominant)

Rh Factor and Pregnancy *Problem: When a fetus is Rh+ and the mother is Rh-, this can cause the mother’s immune system to attack the fetus. There are drugs that will suppress this reaction.