in exactly the same fashion that times to coalescent events are approximated.

Combining natural selection with coalescence and mutation into a three-process waiting-time distribution is now simple. Since the three types of events are mutually exclusive, we add the chance that a natural selection event occurs to the chance that a coalescence or mutation event occurs to get the expected waiting time until an event:

When an event does occur according to the waiting time in equation 7.48, it is then necessary to determine the type of event. Since the total chance that an k(k -1) ka k9

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