Friday, April 11, 2008

more Genetics

OFFICE HOUR:

Monogenic diseases

polygenic what would they look like in the pedigree

two genes homework

example of two traits in the pedigree

three point crosses

three genes map them for drosiphila

coeffinient of map units

interference strength

centromere inhibit cross over opposite of centromere

no chi square

            centromere inhibit cross over

inhibit crossing over between them – closer together

Dna preventing from the normal amount of crossover

distinction between the physical map and the genetic map

not always the same

how mayn letter between these letter

how much cross over happened in these genes

use the genetic map to imply the physical map

over 50 physical map units

70 ph apart how much recombination( 50%)

50 or greater independent

physically linkend but not genetically linked

certain part of chromosomes more than you expect

some DNA doesn’t cross over that much

 

each human is couple of physical map

chromosome 1 2 3 800 map units

 

prions tertiary form

sporatic CJD

primary – 

seconday X alpha sheet

tertiary huge difference in the structure

 

FFI all of the above ( same gene PRNP human gene) specific mutant allele

 

varient / seconday and tertiary

 

sporatic goes to abnomal without environmental

 

enviromental factors

 

CDC

 

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