Thursday 2/16 Only people who have biology work during tutorial this week! You will turn in your lab packet today 1. Why did some pieces of DNA go faster.

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Presentation transcript:

Thursday 2/16 *Only people who have biology work during tutorial this week! *You will turn in your lab packet today 1. Why did some pieces of DNA go faster or slower through the gel yesterday? 2. Did the DNA go toward the positive or negative side? 3. Did any of the lanes on the gel have more than one band? Agenda 1.Pass some things back 2.Finish up Huntington’s Lab 3.Notes: Blood Type 4.Worksheet: The case of the long lost son

1)What are some reasons a person would need a blood transfusion? 2)Can you get a blood transfusion from anyone? Why or why not?

Blood Types Are proteins on surface of red blood cells A, B, O –3 alleles for 1 gene –Each makes a different protein

Blood Transfusions –Are only safe if you don’t receive foreign proteins Your immune system –Makes antibodies to foreign proteins –Can tell difference between “self” & “foreign” proteins

Blood Type Possible Surface Genotypes Proteins A AA, AOA only B BB, BOB only ABABAB O OO “neither”

O allele –Makes a tiny surface protein –Immune system ignores it