Biology October-15-08

Biology October-15-08 - Biology October-15-08 Mary Jane...

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Biology October- 15-08 Mary Jane Case Study A 52 year old woman suffered renal failure. Amid the stressful wait for the identification of potential kidney donors, she receives a phone call that states that 2 of the 3 children she has aren’t hers. She replies “This is ridiculous. I saw those boys being born, what is the evidence?” By using DNA karyotype, Mitochondrial DNA, blood type analysis, and other tools, we can find out if the boys are hers. The homologous pairs of chromosomes are inherited from each parent. ABO blood type alleles have 3 different sequences of DNA that cause different blood types in people. The 3 sequences are i, A, and B. There is a cell surface enzyme that will cause blood type, the alleles of the blood type gene are on the homologus chromosome #9 (The position of this gene is called the locus). There are 3 alleles possible, but each person can only have 2! Daughter cells will have the same genotype as the parent cell.
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Biology October-15-08 - Biology October-15-08 Mary Jane...

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