Figure 4: Dynamical stochastic process of multiplication and selection. Continuous limit, one initial ancestor. Two cardinal examples (a) and (b) . Upper left: probability distribution of finding individuals after multiplication phase of generation (3). Lower left: probability distribution of finding individuals after selection phase of generation (4). Average and standard deviation indicated (correct values only by taking the probability of extinction into account). Upper right: probability of extinction along generation . Lower right: number of individuals and with its standard deviation along generation (least square fit, , see (7) and (8)). Parameters: Maximal total number , multiplication factor , and copy probability (only 10% of individuals that are present before multiplication copy once), surviving probability .