The lack of time needed to let new mutations spread in the population may also explain the inability of the method to provide reliable estimates of the current size of a population in fast exponential expansion (Fig. 2A,C,E).
Others survive in small numbers and, although experts believe the genetic variation between many "improved" breeds is slight, they are reluctant to let them perish for fear of losing important mutations.
The idea, then, is to let natural selection check each mutation and let through only the useful ones, and thus gradually accumulate the small, additive effects of many such mutations into a substantial phenotypic change [ 190].
We assume that specificity determinants, after mutation that allow for a new (sub- function, sub- functioner should negative selection to let this newly asserted function to persist.
Furthermore, the mean phenotype of the genetic background z ¯ B evolves deterministically according to Equation 5 with constant σ g 2. To let the population reach mutation selection drift equilibrium, each simulation is started 4 N e generations before the environment starts changing.
In the case of encountering a patient with some manifestations of type 1 diabetes and some features of T2D, in addition to probable clinical diagnosis of MODY, genetic investigation of identified mutations could let to better diagnosis.
Previously identified let-631 and let-103 were found to be allelic to let-363.
People with mutations that let them withstand low oxygen levels would be more likely to survive and have healthy children.
The other possibility was that the eventual winners were just lucky, that at some point after the 500th generation they developed beneficial mutations that let them pull ahead.
