Most genes have more than two alleles for the same character.
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Transcript of Most genes have more than two alleles for the same character.
MULTIPLE ALLELES
Most genes have more than two alleles for the same character
ABO BLOOD GROUPS
Involves three alleles for a single gene.
These three genes, in various combinations, produce four phenotypes.
Type A, B, AB, O
Carbohydrate A & B
ABO BLOOD GROUPS
A and B refer to carbohydrates that are found on the surface of the red blood cells that bind to antibodies. O - no carbohydrates A - carb. A B - carb. B AB - carbs. A and B
ABO BLOOD GROUPS
The four blood types result from various combinations of the three different alleles symbolized as:
IA – A is codominant to B
IB – B is codominant to A
ii – O is recessive
* Alleles IA & IB are codominant.
BLOOD TYPING PROBLEM
If the mother has heterozygous type A blood and the father has heterozygous type B blood, is it possible for the child to have type O blood?
ABO BLOOD GROUPS
Each blood type has antibodies which bind to foreign carbohydrates (causing the blood to clump). This reaction is a part of the immune
system. Example: Type A blood has antibodies
that react with carbohydrate B.
ABO BLOOD GROUPS
Matching compatible blood groups is important for safe blood transfusions.
Type A blood can accept: A or O
ABO BLOOD GROUPS
Matching compatible blood groups is important for safe blood transfusions.
Type B blood can accept: B or O
ABO BLOOD GROUPS
Matching compatible blood groups is important for safe blood transfusions.
Type AB blood can accept: A, B, or O
ABO BLOOD GROUPS
Matching compatible blood groups is important for safe blood transfusions.
Type O blood can accept: O only
ABO BLOOD GROUPS
Matching compatible blood groups is important for safe blood transfusions.
Type O blood is known as the universal donor.
Type AB blood is known as the universal recipient.