The coalescent with gene conversion

In this article we develop a coalescent model with intralocus gene conversi on. The distribution of the tract length is geometric in concordance with r esults published in the literature. We derive a simulation scheme and deduc e a number of analytical results for tl-lis coalescent with gene conversion . We compare patterns of variability in samples simulated according to the coalescent with recombination with similar patterns simulated according to the coalescent with gene conversion alone. Further, an expression for the e xpected number of topology shifts in a sample of present-day sequences caus ed by gene conversion events is derived.