What Are the Blood Types Found in Humans?

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The classification of blood types depends on specific antigens that are present on the surface of red blood cells. Find out about blood types found in humans with help from an experienced science professional in this free video clip.

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Hi, I'm Michael Maidaa. And this is what are the blood types found in humans? The classification of blood types depends on specific antigens that are present on the surface of red blood cells. Two of the major classifications are the A,B,O system which gives us the letter. And the Rh system which gives us the plus or minus. In the Rh system if the Rh antigen is present then we get a plus. If it is not present we get a minus. Now I will discuss the A,B, O system. So here I will have the genotype. And then on the other side I will have the phenotype. So the phenotypes that most people are aware of consist of A, B, AB and O. So what genotypes can gives us these different phenotypes. If we have an A and an O allele it gives us the A phenotype. Also if we have an AA allele. For B we can have BO or BB. And this will also give us the B phenotype. The AB phenotype however requires one A allele and one B allele. And that is the only way you can get the AB phenotype. Similarly with the O phenotype you need to have two O alleles. And this is the A,B,O classification. With the four phenotypes being A,B, AB,and O. And remember that the plus and minus comes from the Rh system. I'm Michael Maidaa and this has been what are the blood types found in humans?

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