Lab 5 Genetics and Blood Typing

Lab 5 Genetics and Blood Typing - L aboratory 5 Genetics...

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Laboratory 5 Genetics and Blood Typing A. Introduction This lab exercise involves another application of genetics… that of human blood types. Human blood types are determined through two loci (two genes located independently of each other somewhere on our chromosomes). The first gene, the earliest one discovered, is typically called the blood type gene and is characterized by having three alleles in the gene pool. However ,the most any one individual can have is two alleles because we are diploid. Both in a co-dominant fashion, alleles Ia and Ib are equally expressed, and in a dominant-recessive context , alleles Ia and Ib are both dominant over the recessive i. The second gene is called the Rh factor because it was discovered in Rhesus monkeys, but all primates have a similar blood cell protein system. The Rh gene has two alleles (Rh+ and Rh-) that behave in a simple dominant-recessive context (Rh+ is dominant over recessive Rh-). Both genes result in proteins located on the surface of red blood cells that the body uses to identify itself. Thus, there are three possible proteins a person can have on their blood cells, A, B, or
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Lab 5 Genetics and Blood Typing - L aboratory 5 Genetics...

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