Mukati
The freckle gene iri kutaurwa
Vatsvagiri vekuBritain nguva pfupi yadarika vakagadzira bvunzo yeDNA kuti vaone jini ine freckle kuitira kufanotaura mikana yekuva nemusoro mutsvuku. Asi isu tinogona kunyatsoziva ruvara rwebvudzi remwana wedu weramangwana here? Sei uyu uri mumvuri usingawanzoitiki? Muzvinafundo Nadem Soufir, geneticist paAndré Bichat hospital anotijekesera…
Chii chinogadzirisa ruvara rutsvuku rwebvudzi?
Inonzi MCR1 mumutauro wesainzi, jena iri rinowanikwa pasi rose. Zvisinei, ruvara rwebvudzi dzvuku ndicho chikonzero cheti yakasiyana-siyana zvichiita kuti zvigadziriswe. Kazhinji, iyo MCR1 gene, inova receptor, inodzora melanocytes, kureva, masero anoisa pigment bvudzi. Masero aya anoita brown melanin, iyo inokonzera kutsvuka. Asi kana paine akasiyana (kune akati wandei), iyo MCR1 receptor haina kunyatso shanda uye inobvunza melanocytes kugadzira melanin iyo yero-orenji muruvara. Izvi zvinonzi pheomelanin.
Inofanira kuonekwa : Kunyangwe vakatakura gene reMCR1, vanhu verudzi rweAfrica havana mutsauko. Saka havagoni kuva redheads. Kuchinja kwomunhu kunongoerekana kwabatanidzwa nemhoteredzo yake. Ndosaka vanhu vatema, vanogara mumatunhu ane zuva rakasimba, vasina MC1R akasiyana. Paive nekaunda sarudzo, iyo yakavharira kugadzirwa kwemhando dzakasiyana-siyana izvo zvaizove zvakanyanya muchetura kwavari.
Zvinoita here kufanotaura mavanga emwana?
Nhasi, kunyange vasati vabata pamuviri, vabereki vemangwana vanofungidzira maitiro emuviri wemwana wavo. Achava nemhino yei, muromo uchave wakaita sei? Uye vatsvakurudzi vokuBritain munguva ichangopfuura vakagadzira ongororo yeDNA kuti vaone kuti pane jini rinoputika, kunyanya muna amai vane pamuviri kuitira kuti vafanotaura mikana yokuva nemusoro mutsvuku uye kuigadzirira. chero zvekurapa zvevana ava. Uye nokuda kwechikonzero chakanaka, iwe unogona kuva mutakuri wejini iyi, pasina kuva mutsvuku iwe pachako. Zvakadaro iyo geneticist Nadem Soufir ndeye mutsara: iyi ongororo ipenzi chairo. “Kuti uve mutsvuku, unofanirwa kuve nemhando mbiri dzeRHC (ruvara rutsvuku). Kana vabereki vese vari vatsvuku zviri pachena, mwana achadarowo. Vanhu vaviri vane vhudzi rakasviba vanogonawo kuva nemwana ane tsvuku tsvuku, kana mumwe nomumwe wavo ane RHC yakasiyana, asi kukanganisa kunongova 25%. Mukuwedzera, mwana we mestizo kana Creole uye munhu werudzi rweCaucasian anogonawo kuva ane tsvuku-bvudzi. "Genetics ye pigmentation yakaoma, zvinhu zvakati wandei, zvatisati taziva nezvazvo, zvinopinda." Kupfuura mubvunzo wekuvimbika, iyoIyo geneticist inoshora njodzi yetsika: kusarudza kubvisa pamuviri.
Pavanokura, bvudzi reMwana dzimwe nguva rinochinja ruvara. Isu tinocherekedzawo shanduko panguva yekuchinja kuenda mukuyaruka, ipapo kusvika pakukura. Izvi zvinogadziridzwa zvinonyanya kubatanidzwa nekudyidzana nemhoteredzo. Somuenzaniso, muzuva, bvudzi rinoshanduka kuva blond. Vana vane vhudzi dzvuku vanogona kusviba sezvavanokura, asi tint kazhinji inoramba iripo.
Sei zvitsvuku zvishoma?
Kana isu tiri vatakuri veiyo freckle gene, zvinoshamisa kuti chete 5% yevanhu veFrance vakatsvuka. Pamusoro pezvo, kubvira 2011, Danish Cryos sperm bank haichagamuchire vanopa dzvuku, kupa kwacho kuri kukwira zvakanyanya maererano nezvinodiwa. Ruzhinji rwevanogamuchira zvechokwadi vanobva kuGreece, Italy kana Spain uye plebiscite the brown donors. Nekudaro, ma redheads haana kutongerwa kunyangarika, sezvo mamwe makuhwa anofambira mberi. “Kudzikira kwavo kwakanyanya kunoenderana nekusanganiswa kwevanhu. MuFrance, thevanhu vanobva muAfrica, Kuchamhembe kweAfrica, vasina kana vashoma vakasiyana MC1R, akawanda chaizvo. Nekudaro, maredheads aripo zvakanyanya mune mamwe matunhu, akadai seBrittany uko nhamba yavo inoramba yakagadzikana. “Tinoonawo pesvedzero yakatsvuka pedyo nemuganhu weLorraine neAlsatian,” anotsanangura kudaro Dr. Soufir. Mukuwedzera, pane palette yose yetsvuku, kubva kune auburn kusvika kune yakasviba chestnut. Uyezve, avo vanozviti Venetian blond matsvuku anofuratira mumwe nemumwe ”.
Iine 13% tsvuku muhuwandu hwayo, Scotland inobata rekodhi ye redheads. Ivo vari 10% muIreland.
Chengetedza hutano hwevana vatsvuku
Mwana mutsvuku: chenjerera kupiswa nezuva!
Chidziviriro chezuva, kubuda mumumvuri, ngowani… muzhizha, izwi rimwe chete rekutarisa: dzivisa kuisa Mwana pazuva. Vabereki vane vana vane ruvara rutsvuku vanofanira kunge vakangwarira. Uye nokuda kwechikonzero chakanaka, mukukura, ivo vanowanzove vakabatwa nekenza yeganda, saka kukosha kwekudzivirira, kubva paudiki, kubva kune ultraviolet rays.
Kune chikamu chavo, vanhu vekuAsia vane pigmentation yakasiyana, uye mashoma akasiyana. Naizvozvo ivo havana mukana wekuita melanoma. Métis kana maCreoles ane freckles anofanirwawo kungwarira nezuva, kunyangwe iwo "akadzivirirwa zvirinani kubva kuzuva pane vachena".
Kunyangwe kana redheads yakafanorongerwa kubata mamwe cancer uye neruzivo rwekutanga kuchembera kweganda, iyo geneticist inotsanangura kuti "iyo genetic chinhu chinokuvadza kune imwe pfungwa chinewo mhedzisiro inobatsira". Chokwadi, theVanhu vane MC1R akasiyana zviri nyore kubata ultraviolet mwaranzi munzvimbo yakakwirira, inokosha nokuda kwevhitamini D. “Izvi zvinogona kutsanangura chikonzero nei, maererano nenheyo inosanozivikanwa yekusarudza zvisikwa, maNeanderthal, anowanikwa muEastern Europe, akanga atova nebvudzi dzvuku.
Kubatana nechirwere cheParkinson?
Kubatana pakati pechirwere cheParkinson uye kuve mutsvuku dzimwe nguva kunotaurwa. Zvakadaro Nadem Soufir anoramba akangwarira: "Izvi hazvina kusimbiswa. Pane rimwe divi, pane epidemiological association pakati pechirwere ichi uye melanoma. Vanhu vakambova nerudzi urwu rwegomarara reganda vane mukana wakapetwa kaviri kana katatu wekuva nechirwere cheParkinson. Uye avo vanokura chirwere ichi vane njodzi yakawedzera yekukura melanoma. Chokwadi pane zvinongedzo asi hazvingo ende kuburikidza neiyo MC2R gene ”. Uyezve, hapana kuwirirana pakati pefreckles nealbinism. Panyaya iyi, “ongororo ichangobva kuitwa murabhoritari yakaratidza kuti mbeva dze<em>albino hadziiti melanoma, pasinei nokusavapo kwe<em>pigment paganda, kusiyana nembeva dzvuku. “
Redheads, isinganyanyi kunzwa kurwadziwa
Iwo matsvuku matsvuku asingakundwi? Ungatozvitenda! Chokwadi, iyo MC1R gene inoratidzwa mune immune system uye mukati menheyo system inopa kubatsirwa kune redheads yekuve yakanyanya kutsungirira kurwadziwa.
Imwe bhenefiti yakakosha: kukwezva pabonde. Redheads ingave yakawanda… sexy.
Unoda kutaura nezvazvo pakati pevabereki here? Kupa maonero ako, kuunza uchapupu hwako? Tinosangana pa https://forum.parents.fr.