Variation and Selection

Variation and Selection Key Words Key consideration| Definition | allopatric speciation| Speciation due to organisms of a species being disconnected by geographical barriers so that over time members of the cardinal populations become so antithetic that they cannot interbreed and ar considered to be two different species.| Artificial choice| Organisms with beneficial characteristics are selected by manhood and allowed to re heighten, passing on the alleles for these characteristics to their offspring.| biological species fantasy| The biological species concept is a group of kindred organisms that can interbreed and produce fertile offspring. | Clade| A monophyletic taxonomic group; that is, a peerless ancestor and all its descendants.| cladistics| A method of classifying aliment organisms based on their evolutionary ancestry.| Continuous mutation| hereditary variation, also called quantitative variation, where on that point is a wide area of phenotypic variation at bottom the population. There are no clear categories. It is controlled by many genes. | Directional pickaxe| A type of intrinsic selection in which the allele and genotype frequency within a population changes because there is a change in the environment that favours iodine extreme phenotype. Leads to evolution.| noncontinuous variation| similarly called qualitative variation. Genetic variation where there are distinct phenotypic categories. Usually controlled by one gene. | Disruptive selection| A type of natural selection in which the allele and genotype frequencies change because there is a selection twinge favouring either extreme phenotype. May attract to speciation.| Environmental rampart| The combined action of biotic and abiotic factors that limits the offset of a population.| phylogenesis| The process of gradual change in the inherited traits passed from one generation to the next within a population. It results in the establishment of ne w species.| Gene pool| center genetic inf! ormation...If you compliments to get a full essay, enunciate it on our website: BestEssayCheap.com

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