Three Types Of Natural Selection — a labelled NEET Biology diagram with a definitions lexicon.
Three Types of Natural Selection Labelled parts: Stabilizing selection, Directional selection, Disruptive selection, Frequency, Trait value, Average phenotype, Extremes, Intermediate phenotype, Human birth weight, Industrial melanism, Beak size divergence. The observable characteristics or traits of an organism, resulting from the interaction between its genotype and the environment. Examples include physical appearance, blood type, and behavior. FYI: Phenotype is distinct from genotype; while genotype is the genetic makeup (alleles), phenotype is the expressed trait. This is an example of natural selection where the frequency of dark-colored moths increased in industrial areas due to the pollution-darkened tree bark. The dark moths were better camouflaged against the soot-covered background. FYI: This phenomenon provides a textbook example of directional selection in action, demonstrating how environmental changes can rapidly alter population genetics. This refers to the evolutionary process where different species within a group (like finches) develop distinct beak sizes and shapes, allowing them to specialize in different food sources. This is an example of adaptive radiation. FYI: Darwin's finches are the primary example used to illustrate beak size divergence, as different beak shapes are optimally suited for cracking different types of seeds.