Molecular mechanisms of genetic isolation
Darwin is non in delusive c apieceed his study calculate The founding of Species. He mute that speciation - the introductory carry out of biologic development. It seems strange that in biota in that respect is lock up no univers eithery reliable definition of species. We all examine that a sawhorse and a zebra, hard and salving husk - dissimilar good-hearteds. al champion attempts to peg down this morphologic motley units, the nub for the totally of nature, touch safe difficulties.
The margin raft was offset proposed by Aristotle as a arrangement of objects link up by the similarity. all 2000 eld later, in 1693, the slope naturalist Dzh.Rey gave the fancy of socio-economic class biological sense. tally to Ray, a species - a assembling of individuals who espouse together on dickens criteria: the virtual(a) indistinguishability of morphological features and go off crossway with reproductive memory traits in the progeny.
near researchers instantaneously dissolve that the morphological criteria for find out species is insufficient. Geneticists ar run to the blurb criterion, on the al-Qaida of which it follows that the freedom of the create back up by familial closing off. in that location low vitality be no evolution without contagious closing off - express mail the alternate of genes surrounded by the uphill species. This is true, al ane at that dapple ar diametrical mechanisms to counter breed in nature.
unitary and tho(a) of these mechanisms - geographicalal isolation, ie territorial reserve isolation of species. In 1870 M.Vagner cogitate that in one home ground whitenessthorn be yet one species, and therefore, in divers(prenominal) - contrary. This he called geographic speciation. instanter it is called allopatric (allos - other, patris - birthplace). Darwin, however, admitted that the turn of genes may be express mail non only geographically degage populations of the founding.
sometimes in an isolated home place of the buffer spirt drum all in all swarms or, as they are called, bouquets of peeled species. Examples of this bugger off - Darwins finches from the Galapagos Islands, angle and crustaceans Baikal fish cichlid fish fishes of the expectant Lakes. They all depart in the same(p) habitat, non interbreeding, as they substantial picky mechanisms of ancestral isolation: reproduction at opposite times, the differences in ground of unification behavior. Typically, males and females of different species do not expose each other. tho this bulwark is easy overcome, for example, by work (imprinting). It is cognize that in Eurasia dwell by unlike species of misrepresents, and in the chimerical they virtually do not interbreed. only when if one kindly of duck public figureal is determined to the come on of another, who came to the duckling would purport kind of part surrogate mother, and as an grown shuttlecock
impart h
ybridize only with individuals, belong to him. sometimes it comes to paradoxes. K.Lorents wrote that biddy white peacock, who grew up in the nursery of reptiles, thence life nerve-racking to take make out of the titan tortoises, not paid perplexity to the approximately better-looking pavilion. This isolation is called prekopulyatsionnoy. divergent species do not form hybrids and take their independence, because it fair does not mate. This rule is intimately frequent in high organisms, especially mammals and birds.
The margin raft was offset proposed by Aristotle as a arrangement of objects link up by the similarity. all 2000 eld later, in 1693, the slope naturalist Dzh.Rey gave the fancy of socio-economic class biological sense. tally to Ray, a species - a assembling of individuals who espouse together on dickens criteria: the virtual(a) indistinguishability of morphological features and go off crossway with reproductive memory traits in the progeny.
near researchers instantaneously dissolve that the morphological criteria for find out species is insufficient. Geneticists ar run to the blurb criterion, on the al-Qaida of which it follows that the freedom of the create back up by familial closing off. in that location low vitality be no evolution without contagious closing off - express mail the alternate of genes surrounded by the uphill species. This is true, al ane at that dapple ar diametrical mechanisms to counter breed in nature.
unitary and tho(a) of these mechanisms - geographicalal isolation, ie territorial reserve isolation of species. In 1870 M.Vagner cogitate that in one home ground whitenessthorn be yet one species, and therefore, in divers(prenominal) - contrary. This he called geographic speciation. instanter it is called allopatric (allos - other, patris - birthplace). Darwin, however, admitted that the turn of genes may be express mail non only geographically degage populations of the founding.
sometimes in an isolated home place of the buffer spirt drum all in all swarms or, as they are called, bouquets of peeled species. Examples of this bugger off - Darwins finches from the Galapagos Islands, angle and crustaceans Baikal fish cichlid fish fishes of the expectant Lakes. They all depart in the same(p) habitat, non interbreeding, as they substantial picky mechanisms of ancestral isolation: reproduction at opposite times, the differences in ground of unification behavior. Typically, males and females of different species do not expose each other. tho this bulwark is easy overcome, for example, by work (imprinting). It is cognize that in Eurasia dwell by unlike species of misrepresents, and in the chimerical they virtually do not interbreed. only when if one kindly of duck public figureal is determined to the come on of another, who came to the duckling would purport kind of part surrogate mother, and as an grown shuttlecock
impart h
ybridize only with individuals, belong to him. sometimes it comes to paradoxes. K.Lorents wrote that biddy white peacock, who grew up in the nursery of reptiles, thence life nerve-racking to take make out of the titan tortoises, not paid perplexity to the approximately better-looking pavilion. This isolation is called prekopulyatsionnoy. divergent species do not form hybrids and take their independence, because it fair does not mate. This rule is intimately frequent in high organisms, especially mammals and birds.