Two populations of mice living in the same forest are seperated by a large river after a rainstom severe flodding brings several mice from one side to another when the mice from the first reproduce with the others which situation will occur
If the two populations of mice have been geographically separated for a long time, they may have developed genetic differences due to random mutation and natural selection, which could result in reproductive isolation between the two groups. When the mice from one population are introduced to the other, hybridization may occur, but the resulting offspring may have reduced fitness due to genetic incompatibilities. Over time, this could lead to the formation of two distinct species of mice. However, if the two populations are not genetically divergent, the introduction of new individuals may simply increase the genetic diversity of the population without causing any significant evolutionary change.
