It is 200 million years because it has been around for a long time.
Its interphase i think :
The meaning of Interphase is : the period of the cell cycle during which the nucleus is not undergoingdivision, typically occurring between mitotic or meiotic <span>divisions.</span>
Genetic drift happens by chance and can make an allele disappear completely from a gene pool, even if it was a desirable trait that should have been passed down to offspring. The random sampling style of genetic drift shrinks the gene pool and therefore alters the frequency the alleles are found in the population.
