Question

1-) Of all the mutations that occur in a population, why does only a small fraction become widespread?

2-) Why ir rapied evolutionary change more likely to occur in a small papulation?​

Answer 1

1-) A small fraction of mutations become widespread because they are the ones that are most beneficial to the population and are therefore more likely to be passed on to future generations.

2-) Rapid evolutionary change is more likely to occur in a small population because there is less genetic diversity, which means that any beneficial mutations are more likely to spread quickly throughout the population. Additionally, small populations are more susceptible to environmental changes, which can lead to rapid evolutionary adaptation.