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Blood Typing and Blood Genetics PowerPoint Presentation

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Description : Check out this medical presentation on Genetics, which is titled "Blood Typing and Blood Genetics", to know about blood genetics.

Tags : Genetics, Blood Typing, Blood Genetics

Published on : Jul 12, 2021 | Views : 1401 | Downloads : 3

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Slide 1-

Blood Typing and Blood Genetics
Slide 2-

Blood Genetics The human ABO gene is on chromosome 9. Everyone has two copies of chromosome 9 so you have two ABO genes. One copy is inherited from our mother, the other from our father.
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Alleles There are three versions (called “alleles”) of this blood type gene: A, B, and O. A person’s blood type is determined by which allele he/she inherits from each parent.
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Pheno vs. Geno The genetic makeup of an organism is called the “genotype”. The “phenotype” is the visible properties of an organism. In this case, the A, B, and O allele combination a person has is their genotype Their blood type is their phenotype.
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Dominant vs. Recessive Genes The “A” allele is dominant and so is the “B” allele. Together though, the “A” and “B” alleles are co-dominant. The “O” allele is recessive.
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Determining the Genotype The blood type gene has three different alleles: IAIA is Type A IAIB is Type AB IBIB results in Type B ii is Type O
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Determining the Genotype Scenario: Mom has the alleles IAIA for blood type and Dad has the alleles IBIB blood type. What will be the blood type for their child?
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Punnett Sqaures
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Practice Suppose that a mother has blood Type A and genotype IAi and the father has blood Type B and genotype IBi. Draw a Punnett square to show the possible genotypes of their children. What are the phenotypes of the kids?
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Practice
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Blood Types The alleles we discussed “code” for blood type. What they REALLY “code” for is a specific enzyme. That enzyme creates specific antigens on your RBC.
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Antigens An antigen is a protein (encoded from the right enzyme) that “sits” on the surface of your RBC. There are 2 different blood antigens, A and B. If you have the A antigen, you have type A blood. If you have the B antigen, you have type B blood.
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Antigens of the Surface of the RBC
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Antibodies Blood plasma is packed with proteins called antibodies. The body produces a wide variety of antibodies that will recognize and attack foreign molecules. A person’s plasma does not contain any antibodies that will bind to molecules that are part of his or her own body.
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Blood Transfusions Tt is important to carefully match the donor and recipient blood types. If the donor’s blood cells have antigen that are different from those of the recipient, antibodies in the recipient’s blood recognize the donor blood as foreign. This triggers an immune response resulting in blood clotting.
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Blood Transfusions
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Relative Abundance of Blood Types
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Interesting Facts Men generally have more red blood cells than women. Rare blood types exist in addition to the basic ABO system.
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Rhesus Factor (Rh) If a person has a positive Rh factor, this means that their blood contains a protein that is also found in Rhesus monkeys. Most people (about 85%) have a positive Rh factor Rh is expressed as either positive or negative. The Rh factor, like other antigens, is found on the surface of the red blood cells.
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