a. The genes drift from a locus on one chromosome to a locus on another chromosome.
b. The genes drift out on a raft to sea to found new populations on islands.
c. The genes do not drift at all — drift is a mathematical metaphor for mean gene frequencies being unstable and drifting from one number to another.
d. The genes drift from a locus on one chromosome to another locus on the same chromosome.
e. The genes drift into and out of the population due to migration of individuals from one population to another.
