ABO Blood types - inheritance example

Well, for certain we all are exactly the product of our parents. The proof of this is in our Blood. For an example, let’s take a look at some of the “rules“ of Blood type genetics for the population of the United States. (Other population groups have differing Blood type statistics. See information HERE.) There are basically four primary common Blood types. The most common by far is Blood type O, followed by type A, type B, and the least common is Blood type AB. Blood type is determined by the “alleles“ that we inherit from our parents. Alleles are different possible types of a particular gene, in this case the gene(s) controlling our Blood type. There are three common Blood type alleles: A, B, and O. We all have two alleles, one inherited from each parent. The possible combinations of the three alleles are: OO; AO; BO; AB; AA; BB. Blood types A and B are called “codominant“ alleles, (they share in the controlling influence of our genetic Blood make-up) while O is “recessive.“ A codominant allele is apparent, or dominant, even if only one is present; a recessive allele is apparent only if two recessive alleles are present. Since Blood type O is recessive, it is not apparent if the person inherits an A or B allele along with it. Therefore, there are certain possible allele combinations in a particular Blood type: OO = Blood type O AO = Blood type A BO = Blood type B AB = Blood type AB AA = Blood type A BB = Blood type B What all of this means to the paternity puzzle is that ABO Blood typing can only give some preliminary indications as to possible paternity. This rule, however, can not be universally applied, because the vast majority of most people in Caucasian populations has only two of those types (A and O). This means that a male may have a type consistent with paternity and still not be the father of the tested child. DNA typing always yields a more reliable conclusion regarding paternity and is the final word in paternity legal cases. #Heterozygous #bloodEnheritance #PaternityTest #Cancer #Genetics101 #bloodTypeSystem #DNA #alleles #ABOBlood #geneticCode #genes #recessive #chromosome #gene #molecularBiology #nucleicAcids #genetics #BloodType #phenotype #GeneticsExamQuestionsSolutions #GeneticExamQuestionsSolutions #geneExpression #gregorMendel #genotypes #genetic #genotype #GeneticsLecture #ABOBloodType #bloodTransfusionNursing #bloodTypeCompatibility #bloodTypesAndRhFactor