Q6.1. What is the founder effect? Sampling error that occurs during the establishment of a new population by a small number of migrants Natural selection that acts on the founders of a new population in their new, different environment The frequencies of alleles in a population changing slowly over generations due to chance events A period of rapid population growth that immediately follows some population bottlenecks Submit Q6.2. Which of the following statements about genetic drift and population size is TRUE? If a population is large enough, it will not experience any genetic drift. The larger a sample is, the less likely it is similar to its source population. A population can lose genetic diversity when its size is drastically reduced. The effects of genetic drift are less pronounced in very small populations. Submit

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Genetic Variation

Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.

Quantitative Genetics

Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.