Imagine there's a species of flower that blooms in early April. Some seeds are blown over a mountain and the offspring of those seeds start a new population on the other side. After several million years the mountain erodes and the two flower populations are reintroduced to each other. The population that lived on the far side of the mountain flowers in early May, while the other still flowers in early April. The two populations never hybridize, and become their own species. This is an example of: O Gametic Barrier O Temporal Isolation O Habitat Isolation Behavioral Isolation

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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.