Diachronic study
a study done over the course of time. For example, a longitudinal study of children with down syndrome (trisomy 21) might involve the study of 100 children with this condition from birth to 10 years of age. Also called a longitudinal study. The opposite of a synchronic (cross-sectional) study.
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
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This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..