A population of plants raised in a sealed greenhouse has been pure breeding for red flowers for many generations. There are no other plants of this species in the greenhouse or it does not occur outside of the greenhouse. One day a blue-flowered plant is discovered in the population. Which evolutionary force is responsible for this change?
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.
A population of plants raised in a sealed greenhouse has been pure breeding for red flowers for many generations. There are no other plants of this species in the greenhouse or it does not occur outside of the greenhouse. One day a blue-flowered plant is discovered in the population. Which evolutionary force is responsible for this change?
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