Blood Genetics

Jul 25th, 2016
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Blood- Type Genetics

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Blood-TypeGeneticsBlood Cell AntigensBlood types are the result of thepresence (or absence) of antigens(molecules) on the surface of theindividuals red blood cells. These fallinto two groups: A, B, O blood type Rh factorCodominanceThe gene for antigen A and the genefor antigen B are CODOMINANT.Both traits are expressed completelywhen the gene for A is inherited fromone parent and the gene for B isinherited from the other parent.Bloodtype antigens andantibodiesA, B, O InheritanceAllele fromParent 1Allele fromParent 2ChildsgenotypeChildsphenotypeAAAAAAOAOAABABABBAABABBBBBBBOBOBOOOOOBlood Type ProblemThree children recently born in a hospital wereaccidently mixed up. The blood types of the parentsinvolved are given along with the blood types of theinfants. Determine which baby belongs with whichparents, and explain your reasoning for the decisionsyou made.Mother and Father_____ _____Babies_______Parents #1 Type A & Type B Child xType AParents #2 Type O & Type ABChild yType OParents #3 Type B & Type O Child zType ABRh InheritanceRh inheritance is independent of A, B, Oblood type.Rh factorRh+Possible genotypesRh+/Rh+RhParent 1Rh alleleOR Rh+/RhRh-/Rh-Parent 2ChildsRh allele phenotypeRh+Rh+Rh+Rh-Rh+Rh+Rh-Rh-Rh-ABO and Rh blood type distribution by nation (population averages)CountryAustraliaAustriaBelgiumC

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