foretell definition, meaning, what is foretell: to say what is going to happen in the future: . Learn more.
The gene pool is the set of all genes, or genetic information, in any population, usually of a particular species.
The size of the gene pool is a direct measure of the amount of genetic variation. What happens if the gene pool gets smaller? If the gene pool of a population gets smaller you are stating that the amount of genetic variation of a population goes down. In itself this is not bad and it is happening all the time, as natural selection filters out some genetic variation.