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Fitness (often denoted or ω in population genetics models) is a quantitative representation of individual reproductive success.It is also equal to the average contribution to the gene pool of the next generation, made by the same individuals of the specified genotype or phenotype.
It also uses measures of evolutionary fitness to determine if organisms are able to maximize or optimize this fitness, [9] by allocating resources to a range of different demands throughout the organism's life. [1] It serves as a method to investigate further the "many layers of complexity of organisms and their worlds". [10]
Additionally, fitness landscapes of small subsets of evolutionary pathways may be experimentally constructed and visualized, potentially revealing features such as fitness peaks and valleys. [5] Fitness landscapes of evolutionary pathways indicate the probable evolutionary steps and endpoints among sets of individual mutations.
In evolutionary biology, inclusive fitness is one of two metrics of evolutionary success as defined by W. D. Hamilton in 1964: . Personal fitness is the number of offspring that an individual begets (regardless of who rescues/rears/supports them)
Fecundity selection, also known as fertility selection, is the fitness advantage resulting from selection on traits that increases the number of offspring (i.e. fecundity). [1] Charles Darwin formulated the theory of fecundity selection between 1871 and 1874 to explain the widespread evolution of female-biased sexual size dimorphism (SSD ...
Evolutionary physiology is the study of the biological evolution of physiological structures and processes; that is, the manner in which the functional characteristics of organisms have responded to natural selection or sexual selection or changed by random genetic drift across multiple generations during the history of a population or species. [2]
One of the traits that helped make the dinosaurs such an evolutionary success story - thriving for 165 million years - was their fast growth rate, from massive meat-eaters like Tyrannosaurus to ...
In evolutionary biology, an evolutionary tradeoff is a situation in which evolution cannot advance one part of a biological system without distressing another part of it. In this context, tradeoffs refer to the process through which a trait increases in fitness at the expense of decreased fitness in another trait.