Barbara McClintock
Ọdịdị
Barbara McClintock
Barbara McClintock (June 16, 1902 - Septemba 2, 1992) bụ onye American botanist na cytogeneticist. N'afọ 1983, e nyere ya ihe nrite Nobel na Physiology ma ọ bụ ọgwụ.
Okwu okwuru
[dezie]- Ọ bụrụ na agbajie w:Chromosome | chromosome site n'ụzọ dị iche iche, nsọtụ ndị gbajiri agbaji na-eyi ka ọ bụ nrapado ma na-ejikọta ibe ha 2-by-2. Egosiputara nke a nke oma n'ime ihe omumu nke chromosomal aberrations nke ọgwụgwọ X-ray kpatara. Ọ na-apụtakwa mgbe chromosomes ndị yiri mgbanaka mebiri n'ibu n'oge somatic mitoses na ọka, a na-eche na ọ ga-eme n'oge usoro w:Chromosomal crossover|gafefe
- cite journal|title = Nkwụsi ike nke nsọtụ chromosomes gbajiri agbaji na Zea mays .ncbi.nlm.nih.gov/pmc/articles/PMC1209127/
- Mgbe, site na radieshon ma ọ bụ ihe ndị ọzọ, chromosomes gbajiri n'ime otu nucleus, 2-by-2 fusions nwere ike ime n'etiti nsọtụ gbajiri agbaji. Ngwakọta ndị a nwere ike iduga nhazigharị nke akụkụ nke chromatin complement, na-ebute mwepu chromosomal dị iche iche nke achọpụtara dị ka [[w: Chromosomal translocation#
Reciprocal translations|nsụgharị ntụgharị w: Chromesomal inversion | inversion w: Chromosomal Deletion Syndrome | erughị eru wdg Ebe ọ bụ na, n'ime nyocha nke ọma, mmebi ahụ mere n'ime otu nucleus, ọnọdụ ndị na-eduga n'ọgbakọ nke njedebe gbajiri agbaji enweghị ike ịchọpụta ngwa ngwa.
- cite journal|journal=Proc Natl Acad Sci U S A|ụbọchị = Nọvemba 1942|olu=28|okwu=11|peeji=458–463|doi=10.1073/pnas.28.11.458|title=Mgbaji nke Broken Nkwụsị nke Chromosomes na-eso Fusion Nuclear|url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1078518/?page=1
- Nnwale emere n'etiti afọ iri anọ na itoolu kwadebere m ịtụ anya nzaghachi pụrụ iche nke genome maka ihe ịma aka nke genome na-akwadoghị maka izute n'usoro, n'usoro. N'ọnọdụ ndị a maara nke ọma n'ụdị a, ụdị nzaghachi a abụghị nke a ga-ebu amụma tupu nlebanya mbụ banyere ha. Ọ dị mkpa idobe genome ugboro ugboro n'otu ihe ịma aka ahụ iji hụ na ịghọta ọdịdị mgbanwe ọ na-ebute. Amụma ama ama nke a bụ mmepụta nke mmụgharị site na X-ray na ụfọdụ Mutagen|mutagenic agents N'adịghị ka ujo ndị dị otú ahụ nke genome na-adịghị njikere maka ya, bụ ndị genome ga-eche ihu ugboro ugboro, na nke a kwadebere maka ịzaghachi n'usoro nhazi. Ọmụmaatụ bụ [[w:Nzaghachi okpomọkụ |“Nzaghachi okpomọkụ dị na w:Eukaryote|eukaryotic organisms, na w:SOS nzaghachi|“SOS”nzaghachi na nje bacteria Nke ọ bụla n'ime ihe ndị a na-ebute usoro mmemme nke ukwuu n'ime cell nke na-enyere aka ịkwụsị mmetụta nke ujo. Ụfọdụ usoro nhụta ga-adịrịrị n'oge ndị a iji mee ka cell mara ihe egwu dị nso, na ịmalite usoro ihe omume n'usoro ga-ebelata ihe egwu a. Azịza nke genome na ihe ịma aka ndị a na-atụghị anya ya abụghị nke emebere nke ọma. Ka o sina dị, a na-aghọta ihe ndị a, na genome na-azaghachi n'ụzọ a na-ahụ anya ma na mbụ a na-atụghị anya ya.
- cite web|title=Mpụtara azịza nke Genome na ịma aka, nkuzi Nrite Nobel | ụbọchị=8 Disemba 1983|website=nobelprize.org|url=https://www.nobelprize.org/uploads/2018 /06/mcclintock-lecture.pdf