From a biological viewpoint, speculate as to why many traits seemto fit a normal distribution. Students with a strong background inmath and statistics may want to explain how a normal distributionis generated, and what it means. Can you think of biological examplesthat do not fit a normal distribution?
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.
From a biological viewpoint, speculate as to why many traits seem
to fit a normal distribution. Students with a strong background in
math and statistics may want to explain how a normal distribution
is generated, and what it means. Can you think of biological examples
that do not fit a normal distribution?
The distribution for a large population in which the trait of interest varies in a symmetrical way around an average value is called normal distribution. It is common when the phenotypes can be determined by the cumulative effect of several small independent factors. A bell-shaped curve demonstrates the natural distribution of a trait in the population.
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