The influence of backwards mutations on the number of accessible paths in a fitness landscape

This thesis will be about trying to find out which paths evolution took for some selected small organisms and about the influence of backward mutations on a genetic landscape. We will take a look at empirical data and also find features of the models that we use to understand them. Therefore it is important to know about epistasis, which we will treat here as the influence of one mutation on the effect of another. This definition is different from a lot of other definitions that exist for this term (see also [1])