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BIO EXAM 2

TermDefinition
Crossing over occurs in prophase 1
Alfred Sturtevant constructed 1st chromosomes map
Chiasmata where crossing over occurs in meiosis 2
Repulsion dominant alleles on 1 homolog & recessive alleles on the other
coupling both homologs has a dominant & recessive allele
p frequency of A alleles in population
q frequency of a alleles in population
p^2 AA homozygotes frequency
q^2 aa homozygotes frequency
2pq Aa heterozygotes frequency
Hardy Weinberg Equilibrium freq remains constant unless affected by factors other than mendelian
Sewall Wright, R.A Fisher, J.BS. Haldane population genetics "The new evolutionary synthesis"
Natural selection involves the violation of hardy weinbergs assumption all genotypes equally likely to produce offspring
Mutation selection Balance has harmful recessive allele
F. Griffith discovered genetic transformation in streptococcus pneumonide
Oswald Avery set out to identify the "transforming substance"
Avery, McClead, & McCarty Found out DNA is the transforming substance not RNA
Hershey & Chase Confirmed that DNA was the genetic material
Results of Hershey and Chase Experiment 32P- radioactivity in pellets of cells 35S- radioactivity in supernatant
DNA has phosphorus but no sulfur
Protein has sulfur but little phosphorous
Watson and Crick figured out DNA structure (double helix)
F. Chargaff found base pairs (A=T and G=C)
Franklin and Wilkins X-ray diffraction of DNA fibers that shows helical structure.
AT has 2 H bonds
GC has 3 H bonds
5' to 3' starts with phosphorous ends in OH
3' to 5' starts with OH and ends with phosphorous
Created by: Marlynb1
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