Quantitative genetics is a field of genetics that studies the genetic basis of quantitative traits, which are traits that vary continuously rather than being either/or. Synonyms for it could include topics like numerical genetics, or statistical genetics, which highlight the emphasis on mathematical techniques to study the inheritance and variation of traits in populations. Population genetics could also be used as a synonym, as it often focuses on the mechanisms behind evolution and change in populations, which includes the genetic basis of quantitative traits. The study of complex traits might also be used to describe quantitative genetics, recognizing that these traits usually have a large number of contributing factors.