A population of birds that is undergoing stabilising selection will resemble the current mean more after a few generations.
When natural selection favors an average phenotype and excludes extreme deviations, stabilising selection reduces the genetic variance of a population. When exposed to environmental changes, a population's genetic variation shifts toward a new phenotype, which is known as directional selection.
Other than the fact that the most typical person is chosen, there is no common cause of stabilising selection. In this sense, the enhanced fitness and reproductive success of the median individuals is the cause of stabilising selection, just like it is for all other types of selection.
To know more about genetic variance, click the below link
https://brainly.com/question/25702725
#SPJ4
