Positive selection/ Negative selection

http://www.chenlianfu.com/?p=3084
https://www.cnblogs.com/bio-mary/p/12923978.html

1. Positive selection

Positive selection = Darwinian selection = Positive Darwinian selection = Adaptive selection

Positive selection is the process by which new advantageous genetic variants sweep a population.

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https://www.science.org/doi/10.1126/science.1124309

Positive natural selection is the force that drives the increase in prevalence of advantageous traits.

https://depts.washington.edu/jtlab/positiveSelection.html

Positive selection is the process by which new advantageous genetic variants sweep a population.

2. Negative selection

Negative selection = Purifying selcetion

https://en.jinzhao.wiki/wiki/Negative_selection_(natural_selection)

Negative selection is the selective removal of alleles that are deleterious.

https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/negative-selection-natural-selection

Purifying selection is the most prevalent form of selection as it constantly sweeps away deleterious mutations that are produced in each generation.