Which of the following are reasons why we need to use special scientific analyses in evolutionary biology? There is increased error when comparing traits among species rather than within species. The trait values among species are likely correlated, and therefore they are not independent data points. Researchers have to take an average trait value per species so they can compare among species. The fact that species have been separated for millions of years requires extra error be built into statistical models.
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 are reasons why we need to use special scientific analyses in evolutionary biology?
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There is increased error when comparing traits among species rather than within species. |
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The trait values among species are likely correlated, and therefore they are not independent data points. |
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Researchers have to take an average trait value per species so they can compare among species. |
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The fact that species have been separated for millions of years requires extra error be built into statistical models. |
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