Mardi Gras-a carnival held in some countries on Shrove Tuesday (the last day before Lent) but especially in New Orleans.
Bottleneck effect is when there's something that either kills the majority of the population or just prevents it from reproducing. This creates genetic drift because the likelihood of gene prominence changing is much higher in a small population. The Founder Effect is a type of Bottleneck effect. It is when a small amount of individuals starts a population usually due to migration.
founder effect The difference in gene pool s between an origin al population and a new population founded by one or a few individuals randomly separated from the origin al population, as when an island population is founded by one or a few individuals; often accentuates genetic drift.ounder effect. founder effect. a high frequency of a particular allele in a population founded by a small ancestral group when one or more of the founders was a carrier of that allele. Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition.