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English: A trait under positive selection. The blue dashed line shows the current mean population trait value, the red dashed line shows the mean population trait value in the next generation. Because high trait values are associated with higher fitness the the mean trait value increases due to selection.
Frequency-dependent selection is an evolutionary process by which the fitness of a phenotype or genotype depends on the phenotype or genotype composition of a given population. In positive frequency-dependent selection, the fitness of a phenotype or genotype increases as it becomes more common.
While evolutionary views tend to regard most individual differences as the result of either random genetic noise (evolutionary byproducts) [2] and/or idiosyncrasies (for example, peer groups, education, neighborhoods, and chance encounters) [3] rather than products of natural selection, EDP asserts that natural selection can favor the emergence ...
Choice-supportive bias or post-purchase rationalization is the tendency to retroactively ascribe positive attributes to an option one has selected and/or to demote the forgone options. [1] It is part of cognitive science , and is a distinct cognitive bias that occurs once a decision is made.
Scarr and McCartney defined niche picking as a mechanism used to select environments suitable for one's genotype. Therefore, an individual’s temperament often affects the type of niche selected, since environment reflects one’s general disposition.
A significant example of directional selection in populations is the fluctuations of light and dark phenotypes in peppered moths in the 1800s. [16] During the industrial revolution, environmental conditions were rapidly changing with the newfound emission of dark, black smoke from factories that would change the color of trees, rocks, and other ...
To make this 20-minute vegan curry even faster, buy precut veggies from the salad bar at the grocery store. To make it a full, satisfying dinner, serve over cooked brown rice.
However, even if the original value of α is accurate for a particular time period, this extrapolation is still invalid. This is because there has been a large acceleration in the amount of positive selection in the human lineage over the last 40,000 years, in terms of the number of genes that have undergone adaptive evolution (Hawks et al. 2007).