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.
Examine
The traits or characters that can be easily observed in the individuals of the population are referred to as phenotypes. The variability or difference in various phenotypes exhibited by the individuals in a population is called phenotypic variance. These phenotypic variations are the results of environmental or genetic changes, or the combined effect of both. It includes the difference in heights, color or difference in various phenotypic characters.
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