منابع مشابه
Detecting genetic variation in developmental instability by artificial selection on fluctuating asymmetry
Fluctuating asymmetry (FA) is frequently used as a measure of developmental instability (DI). Assuming a genetic basis to DI, many have argued that FA may be a good indicator of genetic quality to potential mates and to human managers of populations. Unfortunately FA is a poor indicator of DI, making it very difficult to verify this assertion. A recent review of the literature suggests that pre...
متن کاملFluctuating Asymmetry
Fluctuating asymmetry refers to small random deviations from perfect symmetry in bilaterally paired structures; it is thought to reflect an organism’s ability to cope with genetic and environmental stress during development and its utility as an indicator of such stresses is based on the assumption that perfect symmetry is an a priori expectation for the ideal state of bilateral structures. Flu...
متن کاملFluctuating asymmetry and general intelligence: No genetic or phenotypic association
Fluctuating asymmetry (FA) is the non-pathological left–right asymmetry of body traits that are usually left–right symmetrical, such as eye breadths and elbow to wrist lengths in humans, but which can be affected by developmental stressors. It is generally considered throughout biology to be an indicator of developmental instability and thus of lack of overall biological fitness. Several invest...
متن کاملEnvironmental variation, fluctuating selection and genetic drift in subdivided populations.
Although there have many studies of the population genetical consequences of environmental variation, little is known about the combined effects of genetic drift and fluctuating selection in structured populations. Here we use diffusion theory to investigate the effects of temporally and spatially varying selection on a population of haploid individuals subdivided into a large number of demes. ...
متن کاملThe ontogeny of fluctuating asymmetry.
We tested seven hypotheses regarding the mechanisms by which fluctuating asymmetry (FA) originates. We did this by analyzing data on four bilateral characters measured repeatedly during the development of individual domestic fowl. Immediately posthatching, there was substantial directional asymmetry, which rapidly decreased. We detected FA at significant levels in all characters in the majority...
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ژورنال
عنوان ژورنال: Journal of Evolutionary Biology
سال: 1997
ISSN: 1010-061X,1420-9101
DOI: 10.1046/j.1420-9101.1997.10010051.x