What is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? 1)For a given population density and sampling effort, eDNA has a higher probability of detecting a species if it is present. 2)By looking at telomere length on the chromosomes found in an environmental 3)DNA sample, researchers can gather information about the age distribution of organisms in a population. 4)By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. 5)All of the above

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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.