Hardy Weinberg
http://nhscience.lonestar.edu/biol/hwe.html
Genes, Population and Alleles
 Is there a relationship?
Gene Pool and Allelic Frequencies
 Gene Pool =
 Allelic Frequency =
 How can we use this information?
Hardy Weinberg
 Calculate Allelic frequencies in a given population
 If we were to calculate the allelic frequencies what
would we need to assume?
Hardy Weinberg- Assumptions
 Large population
 No migration
 No evolution hence no mutation
 No selection pressures
 No species selection
 Allopatric Speciation does not occur
Possibility of Alleles =
 Total = 1
 So dominant and recessive alleles =1
Hardy Weinberg
 Recessive phenotypes need both RECESSIVE alleles
 Homozygous dominant phenotypes need both
DOMINANT alleles
 Heterozygotes need one of each allele
Hardy Weinberg Examples
 Page 127