00:01
The expected frequency of heterozygotes in a population, if it is at equilibrium and the frequency of a, is 0 .8.
00:08
Okay, so when i hear it's at hardy -weinberg equilibrium, i want to write out two equations, because we will definitely be using them.
00:17
So these are the two equations.
00:20
The first one is for allele frequency.
00:23
So every copy of the gene in this population is one of these two alleles, so their frequency has to add up 100%.
00:30
Second one is genotype frequency.
00:33
Every individual has one of these three genotypes.
00:37
Homozygous dominant, homozygous recessive, heterozygous.
00:41
So a frequency of those also has to add up to 100%.
00:44
Okay.
00:46
So from this, we can immediately work out the frequency of the recessive allule.
00:51
Actually, oh, it's 0 .0 .08, so this is 0 .90.
00:54
There we go...