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.
(In biology) The bottleneck effect happens when the size of a population or even an entire species is suddenly reduced, with lasting effects on at least one generation.A popu â¦ lation bottleneck may occur after an epidemic, drought, fire, hunting, or other destructive events.ottleneck effect is an evolutionary event in which population size is radically reduced because of catastrophic events. founder effect occur when few individuals migrate fr â¦ om main population and establishes a separate population in new geographical location.