WebNatural selection would favor both light and dark colored mice, but select against mice of intermediate color. O STUDENT PAGE DIRECTIONAL SELECTION Selection against one extreme SHORT MEDIUM Population after selection Original population LONG FOR: one extreme trait AGAINST: the other extreme STABILIZING SELECTION Selection against … WebNatural selection on polygenic traits can take the form of: Stabilizing selection: Intermediate phenotypes have the highest fitness, and the bell curve tends to narrow. Directional …
19.3B: Stabilizing, Directional, and Diversifying Selection
Natural selection is known to be one of the most important biological processes behind evolution. There are many variations of traits, and some cause greater or lesser reproductive success of the individual. The effect of selection is to promote certain alleles, traits, and individuals that have a higher chance to survive and reproduce in their specific environment. Since the environment has a carrying capacity, nature acts on this mode of selection on individuals to let only the most fit off… WebEach type of selection contains the same principles, but is slightly different. Disruptive selection favors both extreme phenotypes, different from one extreme in directional selection. Stabilizing selection favors the middle phenotype, causing the decline in variation in a population over time. [3] Evidence [ edit] fife work for us
Directional Selection, Stabilizing Directional and Disruptive Selection
WebStabilizing selection When selective pressures select against the two extremes of a trait, the population experiences stabilizing selection. For example, plant height might be acted on by stabilizing selection. A plant … WebDirectional selection is when, over multiple generations, an entire population shifts its phenotype towards one extreme. Stabilizing selection is when the extremes of that trait decrease in frequency compared to the less extreme phenotypes. In the example of size, the extreme phenotypes are very small and very large. grill cheese air fryer