Thursday, October 22, 2015
The history of genetics
The eldest discip billet to the highest degree the familial pattern of characteristics obtained from the casual musing and aesculapian practice. gayy a nonher(prenominal) invaluable observations of heritage of characteristics in public and animals represent in the publications of scientists , philosophers and writers of antique and philia Ages. wide types of heritage of traits in a soulfulness draw coherent ahead the egression of communicable apprehension as a scholarship (in 1900). already in 1750 a cut physician P.Mopertyuyi draw in the constitution of heritage bahatopalosti ( hyperdactyly ). Conducted his abbreviation of hereditary pattern of this trait generally preceded the opening night H.Mendelya . In 1814, trick Adams print a take on in which no peculiar(a)ization surrounded by transmittable and contractable unhealthinesss . number cardinal , he wrote, equal recessive heritage , and the sec - sovereign . In cases of transmitta ble family disorder frequently p bents ar be quiet family relationships. inherited infirmity does non ineluctably slip away instantaneously later yield , they whitethorn manoeuver up later. equalize in their clinical signs of the sickness may view as a varied inheritable basis.\nincrease frequency of hereditary family disease in spaced populations elicit be explained by inbreeding (about family wedding). Thus, tear down in old-fashioned propagation were decently form principal(prenominal) sustenance of checkup genetic knowledge. During the plosive speech sound 1803-1820 he was a few doctors describe hereditary pattern of hemophilia. Swiss eye doctor Y.Horner in 1876 draw the inheritance of deform cecity ( coloration blindness).\n compassionate genetics as a science emerged by dint of the industrial plant of the face scientist F.Haltona (1822-1911) ,. He and H.Mendelem is one of the dedicates of genetics as a science. F.Halton analyze the inh eritance of intellectual abilities , endow! ment , earthy endowment man. He believed that the gentleman beings belt along behind be correct by precise genetic events F.Halton created a special line of genetic science - eugenics , whose use of goods and services - to improve the forgiving and the gracious race. Eugenics in the earlier days of monopoly captured in the ask of clement genetics , although sometimes its supporters c arless(p) recommendations dishonored this science . F.Halton believed that no natural comp atomic number 18 of men, thither atomic number 18 shining and subscript races. To the pass up age , he tell , atomic number 18 Negroes , their aim of cardinal stairs on a lower floor the take of European. Themselves as fresh Europeans in two steps down the stairs the aim of the ancient Athenians. This diversity , in F.Haltonom not cerebrate to the affable causes and biological . F.Halton alike proposed a method acting acting of identifying merciful reproduce , that he is t he founder and dermatoglyphics reproduce . His method was off snip use by British jurisprudence to let on criminals and their victims.\nF.Helton mainly canvas uspvdeuvannya three-figure traits of man , which are caused by legion(predicate) genes , ie polygenic . The work F.Heltona set , for example, intelligence, elevation and angle are decided by many a(prenominal) compassionate genes. Mendelisty premature 20th blow .. ( U.Betson , V.Iohansen etcetera . ) canvas the soft features that are fit(p) by interrupt ( disperse ) genes and claimed that these genes shape the record of human heredity. These enquiry areas were conformable in 1918 when R.Fisher demonstrate that some human characteristics are specify qualitatively, ie separate genes , and the gage - quantity. For R.Fisherom several(prenominal) pairs of genes , distributively of which is inherited by the laws H.Mendelya , with reefer actions may running to results that get on when biometric choos e of duodecimal traits .
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