WebAn Example of Sexual Selection Observed in Cichlid Fish. Sexual selection leading to sympatric speciation was observed in cichlid fish. African cichlids found in the African Great Lakes are one of the most diverse fish on Earth. Lake Victoria alone was home to around 600 species of cichlid. Genetic evidence shows that these species emerged ... WebDiversifying selection can also occur when environmental changes favor individuals on either end of the phenotypic spectrum. Imagine a population of mice living at the beach …
Evidence of directional and stabilizing selection in ... - PNAS
WebDisruptive selection (diversifying selection) favors the two extreme phenotypes of the trait and minimizes the average phenotype. Thus, disruptive selection creates a bimodal distribution of a trait in the population; consequently, it is the opposite of stabilizing selection in the outcome ( Figure 2.5C ). WebMar 16, 2024 · There are three main types of directional selection: stabilizing, disruptive, and diversifying selection, each of which has different effects on the distribution of traits within a population. ... Examples: Evolution of longer beaks in birds, increase in body size in mammals: Examples: Genetic drift, stabilizing selection, balancing selection ... fah126s2t
19.3B: Stabilizing, Directional, and Diversifying Selection
WebDiversifying (or disruptive) selection: Diversifying selection occurs when extreme values for a trait are favored over the intermediate values.This type of selection often drives speciation. Diversifying selection can also occur when environmental changes favor individuals on either end of the phenotypic spectrum. WebThere are several ways selection can affect population variation: stabilizing selection, directional selection, diversifying selection, frequency-dependent selection, and sexual selection. ... A classic example of this type of selection is the evolution of the peppered moth in eighteenth- and nineteenth-century England. Prior to the Industrial ... http://bivalves.teacherfriendlyguide.org/index.php?option=com_content&view=article&id=42&Itemid=124 dog friendly restaurants pitlochry