Genetics handout week 9

Genetics handout week 9 - Greg Tyson gtyson@ucsd.edu...

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Greg Tyson gtyson@ucsd.edu Genetics Handout Week 9 Fill in the table Blood type Possible genotypes Antigen Antibodies A AA, AO A_____ anti-B B BB, BO B_____ anti-A AB AB____ A and B None O OO____ None__ anti-A and anti-B 1. Multiple alleles are for traits with more than 2 alleles in a population, but there are only 2 in each individual. 2. Blood types A and B are codominant , and are dominant compared to blood type O. 3. Why do they no longer call blood type O the universal donor and AB the universal acceptor? Because there are many other antigens on blood cells besides A and B, so some of these other antigens may be attacked by antibodies in the person who received blood. 4. Why do people naturally make antibodies for A and B antigens if they have blood type O? What happens if they get a blood transfusion from someone with blood type AB? There are bacteria that have antigens similar to those on A and B red blood cells, so these same antibodies produced to attack the bacteria can attack the transfused red blood cells. If you get a blood transfusion from someone with blood type AB, the foreign red blood cells will be attacked, and clumps of red blood cells and antibodies will form, which will kill you
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This note was uploaded on 11/02/2008 for the course BICD 100 taught by Professor Nehring during the Spring '08 term at UCSD.

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Genetics handout week 9 - Greg Tyson gtyson@ucsd.edu...

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