Population
Group of organisms of same species occupying particular space at particular time than can potentially interbreed
Gene pool
Total of all alleles of all genes of all individuals in population at particular time
Allele frequency
Number of times an allele occurs in gene pool
Equation for allele frequency of single gene in population
p + q = 1
p = frequency of dominant allele
q = frequency of recessive allele
Issue with p + q = 1
Must know which individuals homozygous / heterozygous
Hardy Weinberg equation
p2 + 2pq + q2 = 1
p = frequency of dominant allele
p2 = homozygous dominant
q = frequency of recessive allele
q2 = homozygous recessive
2pq = heterozygous dominant
Hardy Weinberg assumptions
No mutations
Population isolated
No selection pressure
Population large
Mating random
Carriers
Have allele but not trait
Which equation should you use?
Tell you heterozygous = allele frequency
Don’t know = Hardy Weinberg