56 The genetic drift in a group is defined to be the variati

56. The genetic drift in a group is defined to be the variation in its genetic composition due to repro- duction among a small population. The propor- tion of heterozygotes (a certain genotype) in the population is approximately an exponential func- tion of t generations of reproduction. The relative growth rate for the proportion of heterozygotes is where N is the population size. The initial 2N proportion of heterozygotes we label Ho. (a) Write a formula for H as a function of t.

Solution

a) H= H0 e^((-1/(2N))t)
b) H= 0.2e^((-1/(2*100))t)
c)2H0=H0 * e^((-1/(2*50))t)
2=e^((-1/(2*50)t)
2/0.999=t
t=2.02