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.
A population's allele frequency is the fraction of the copies of one gene that share a particular form.[3] Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. When there are few copies of an allele, the effect of genetic drift is larger, and when there are many copies the effect is smaller.