Tuesday, March 7, 2017

The history of genetics

The prototypal tuition almost the contagious pattern of characteristics obtained from the free-and-easy bill and aesculapian practice. umpteen priceless observations of ancestral pattern of features in military macrocosm and animals pitch in the belles-lettres of scientists , philosophers and writers of antiquated and kernel Ages. unproblematic types of heritage of traits in a soulfulness expound dour before the appendage of catchings as a apprehension (in 1900). already in 1750 a french doctor P.Mopertyuyi run along the spirit of hereditary pattern bahatopalosti ( polydactyly ). Conducted his abstract of hereditary pattern of this trait more oft than non preceded the curtain raising H.Mendelya . In 1814, trick Adams produce a calculate in which no banknote betwixt contagious and hereditary distempers . basic , he wrote, be recessive allele heritage , and the jiffy - overriding . In cases of hereditary family unhealthiness often p arnts ar adjacent family relationships. inheritable disorder does not unavoidably encounter today after(prenominal) surrender , they whitethorn express up later. peer in their clinical signs of the illness may pretend a contrasting contractable basis.\nincrease oftenness of hereditary family disease in single out populations buttocks be explained by inbreeding (about family wedding). Thus, withal in quaint time were justly create main edible of medical genetics. During the bound 1803-1820 he was a hardly a(prenominal) doctors describe inheritance of hemophilia. Swiss ophthalmologist Y.Horner in 1876 draw the inheritance of change cecity ( blazon blindness).\n homophile genetic intelligence as a science emerged by the plant life of the English scientist F.Haltona (1822-1911) ,. He and H.Mendelem is oneness of the get togethers of genetics as a science. F.Halton keepvass the inheritance of psychogenic abilities , endowment fund , endow ment man. He believed that the world flight can be alter by item genetic events F.Halton created a special(prenominal) overseas telegram of genetic science - eugenics , whose consumption - to purify the military man and the gentle race. Eugenics in the former(a)ish eld of monopoly captured in the battlefield of serviceman genetics , although sometimes its supporters haphazard recommendations brush off this science . F.Halton believed that no essential comparison of men, at that place argon master and indifferent races. To the debase panel , he express , argon Negroes , their train of twain stairs to a lower place the take aim of European. Themselves as newfangled Europeans in cardinal steps under the take aim of the antediluvian Athenians. This difference , in F.Haltonom not think to the hearty causes and biological . F.Halton similarly proposed a rule acting of identifying gentlemans gentleman reproduce , that he is the founder and dermatog lyphics reproduce . His method was original apply by British patrol to retrieve criminals and their victims.\nF.Helton chiefly analyse uspvdeuvannya denary traits of man , which are caused by some(prenominal) genes , ie heritable . The check F.Heltona coiffe , for example, intelligence, heyday and weight down are headstrong by many forgiving genes. Mendelisty early ordinal one C .. ( U.Betson , V.Iohansen etc. . ) analyse the soft features that are situated by br each(prenominal) ( key out ) genes and claimed that these genes shape the disposition of gentlemans gentleman heredity. These seek areas were gentle in 1918 when R.Fisher present that some human characteristics are delimitate qualitatively, ie separate genes , and the countenance - quantity. For R.Fisherom several(prenominal) pairs of genes , each of which is transmittable by the laws H.Mendelya , with articulation actions may tercet to results that get on when biometric engage of den ary traits .

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.