N\u00ebse ndonj\u00ebher\u00eb keni menduar pse disa njer\u00ebz kan\u00eb sy blu, nj\u00eb studim shkencor mund t\u00eb jap\u00eb p\u00ebrgjigjen.<\/p>\n
N\u00eb fillim, t\u00eb gjith\u00eb njer\u00ebzit kishin sy ngjyr\u00eb kafe . Megjithat\u00eb, nj\u00eb mutacion gjenetik q\u00eb preku gjenin OCA2 n\u00eb kromozomet njer\u00ebzore \u00e7oi n\u00eb nj\u00eb lloj \u201cnd\u00ebrrimi\u201d q\u00eb ndryshoi rrjedh\u00ebn e evolucionit t\u00eb ngjyr\u00ebs s\u00eb syve. Ekspert\u00ebt nga Universiteti i Kopenhagenit besojn\u00eb se e kan\u00eb zgjidhur k\u00ebt\u00eb mister \u2013 dhe gjith\u00e7ka duket se t\u00eb \u00e7on vet\u00ebm te nj\u00eb person.<\/p>\n
Sipas pohimeve t\u00eb tyre, p\u00ebrpara se t\u00eb shfaqej nj\u00eb paraardh\u00ebs i vet\u00ebm evropian, t\u00eb gjith\u00eb njer\u00ebzit kishin sy ekskluzivisht ngjyr\u00eb kafe. Ky ndryshim ndodhi af\u00ebrsisht 6,000 deri n\u00eb 10,000 vjet m\u00eb par\u00eb, p\u00ebr shkak t\u00eb nj\u00eb mutacioni gjenetik.<\/p>\n
Si\u00e7 e kujtojn\u00eb shum\u00eb veta nga tekstet shkollore, ngjyra e syve blu \u00ebsht\u00eb rezultat i nj\u00eb gjeni recesiv \u2013 nj\u00eb person duhet t\u00eb trash\u00ebgoj\u00eb dy gjene t\u00eb tilla p\u00ebr t\u00eb pasur sy blu. Megjithat\u00eb, deri von\u00eb, nuk dihej sakt\u00ebsisht se nga vinin k\u00ebto gjene.<\/p>\n
Hulumtimi u drejtua nga Profesor Hans Eiberg nga Departamenti i Mjek\u00ebsis\u00eb Qelizore dhe Molekulare. N\u00eb vitin 2008, ai shpjegoi se nj\u00eb mutacion n\u00eb gjenin OCA2 \u00e7oi n\u00eb uljen e prodhimit t\u00eb melanin\u00ebs n\u00eb irisin e syrit, duke b\u00ebr\u00eb q\u00eb ngjyra kafe t\u00eb \u201chollohej\u201d dhe t\u00eb dukej blu.Megjithat\u00eb, momenti ky\u00e7 nuk \u00ebsht\u00eb n\u00eb vet\u00eb gjenin OCA2, por n\u00eb gjenin HERC2, i cili e rregullon at\u00eb. HERC2 funksionon si nj\u00eb \u00e7el\u00ebs q\u00eb zvog\u00eblon ose bllokon plot\u00ebsisht veprimin e OCA2, duke rezultuar n\u00eb nj\u00eb ngjyr\u00eb m\u00eb t\u00eb \u00e7el\u00ebt \u2013 m\u00eb blu \u2013 t\u00eb syve.<\/p>\n
\u00cbsht\u00eb interesante se t\u00eb gjith\u00eb njer\u00ebzit me sy blu kan\u00eb t\u00eb nj\u00ebjtin mutacion gjenetik n\u00eb t\u00eb nj\u00ebjtin vend n\u00eb ADN-n\u00eb e tyre, duke treguar nj\u00eb paraardh\u00ebs t\u00eb p\u00ebrbashk\u00ebt. Edhe pse nevojiten m\u00eb shum\u00eb k\u00ebrkime, supozohet se ky mutacion u p\u00ebrhap me migrimin e njer\u00ebzve nga Afrika n\u00eb Evrop\u00eb, gj\u00eb q\u00eb shpjegon pse ngjyra blu e syve \u00ebsht\u00eb m\u00eb e zakonshme tek njer\u00ebzit me prejardhje evropiane.<\/p>","protected":false},"excerpt":{"rendered":"
N\u00ebse ndonj\u00ebher\u00eb keni menduar pse disa njer\u00ebz kan\u00eb sy blu, nj\u00eb studim shkencor mund t\u00eb jap\u00eb p\u00ebrgjigjen. N\u00eb fillim, t\u00eb gjith\u00eb njer\u00ebzit kishin sy ngjyr\u00eb kafe . Megjithat\u00eb, nj\u00eb mutacion gjenetik q\u00eb preku gjenin OCA2 n\u00eb kromozomet njer\u00ebzore \u00e7oi n\u00eb nj\u00eb lloj \u201cnd\u00ebrrimi\u201d q\u00eb ndryshoi rrjedh\u00ebn e evolucionit t\u00eb ngjyr\u00ebs s\u00eb syve. Ekspert\u00ebt nga Universiteti […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-79688","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/posts\/79688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/comments?post=79688"}],"version-history":[{"count":0,"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/posts\/79688\/revisions"}],"wp:attachment":[{"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/media?parent=79688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/categories?post=79688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zennihost.com\/test\/wp-json\/wp\/v2\/tags?post=79688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}