TOP 5 STRANGE SMELLS: 1  1. Dead Animal. 2  2. Something Smells Fishy. 3  3. Sewage. 4  4. Moldy and Musty. 5  5. Rotten Eggs. 6  For tips on saving money and energy this winter, take a look at our previous blog posts:
Genetic drift is the change in the relative frequency in which a gene variant (allele) occurs in a population due to random sampling. That is, the alleles in the offspring in the population are a random sample of those in the parents.
The founder effect is an extreme example of genetic drift.. Genes occurring at a certain frequency in the larger population will occur at a different frequency -- more or less often -- in a smaller subset of that population.