Which of the following is a reason we see continuous, quantitative traits like weight? - Environment doesn't play a role in quantitative traits - Multiple genes can play a role in determining the traits - Only one allele on one gene is responsible for a given quantitative trait - Natural selection doesn't act on quantitative traits
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.
Which of the following is a reason we see continuous, quantitative traits like weight?
- Environment doesn't play a role in quantitative traits
- Multiple genes can play a role in determining the traits
- Only one allele on one gene is responsible for a given quantitative trait
- Natural selection doesn't act on quantitative traits
Quantitative traits are traits for which phenotypic variation is continuously distributed in natural populations, with population variation often approximating a statistically normal distribution on an appropriate scale.
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