  Data from a long time evolution experiment with Escherichia Coli and from a
large study on copy number variations in subjects with european ancestry are
analyzed in order to argue that mutations can be described as Levy flights in
the mutation space. These Levy flights have at least two components: random
single-base substitutions and large DNA rearrangements. From the data, we get
estimations for the time rates of both events and the size distribution
function of large rearrangements.
