Ma'auratan Tsakanin Kabilanci Zasu Iya Yin Dogayi, Yara Mafi Waya Saboda Babban Bambancin Halitta: Nazari
Ma'auratan Tsakanin Kabilanci Zasu Iya Yin Dogayi, Yara Mafi Waya Saboda Babban Bambancin Halitta: Nazari
Anonim

’Yan Adam a yau suna rikidewa sun fi kakanninsu wayo, tsayi, har ma da tsawon rayuwa. A cewar wani bincike na baya-bayan nan da aka buga a cikin mujallolin Nature, sanannen canjin tsayi da hankali a duk cikin juyin halitta na iya dangantawa da bambancin jinsin mahaifan zuriya.

Haihuwar jima'i yana da mahimmanci don kiyaye bambancin kwayoyin halitta a cikin nau'in ɗan adam. Ya haɗu da kayan gado na iyaye, yana haifar da zuriya waɗanda ke da nau'in tsarin tsarin halitta na musamman wanda ke ƙara yawan damar su na rayuwa da bunƙasa idan aka kwatanta da yawan jama'a masu iyakacin bambancin kwayoyin halitta. Wannan ya ƙunshi ka'idar Charles Darwin na zaɓin yanayi, inda mutane masu halaye waɗanda ke haɓaka yuwuwar rayuwarsu za su sami ƙarin damar haifuwa, a cewar Jami'ar California, Fahimtar Juyin Halittar Berkeley. A sakamakon haka, zuriyarsu za su amfana daga bambance-bambancen, wanda zai bazu ko'ina cikin yawan jama'a.

A yunƙurin zurfafa bincike kan fa'idodin “haihuwa,” babban jami’in bincike Jim Wilson da tawagarsa daga Jami’ar Edinburgh da ke Scotland sun yi nazari kan bambancin kwayoyin halittar bayanan kwayoyin halitta tare da halaye guda shida na kwayoyin halitta, daga tsayi zuwa iya fahimta. Masu binciken sun yi nazarin bincike daban-daban fiye da 100 da aka gudanar a duniya, wadanda suka hada da sama da mutane 350,000 da ke zaune a yankunan karkara da birane. Sakamakon binciken ya nuna halaye guda huɗu - tsayi, ƙarfin huhu, ƙarfin fahimi gabaɗaya, da samun ilimi - sun ƙaru sosai cikin alaƙa da kwayoyin halitta waɗanda suka mallaki ƙarin bambancin kwayoyin halitta.

Kwayoyin halittar mutanen sun hada da wadanda ke zaune har zuwa Finland da Gabashin Asiya. Abubuwan da ba na halitta ba kamar bambance-bambance a cikin tarbiyya saboda matsayin zamantakewa da tattalin arziki an yi la'akari da su. Duk da haka, masu binciken har yanzu sun gano matakin bambance-bambancen kwayoyin halitta har yanzu wani muhimmin al'amari ne da ke shafar halaye hudu. "Akwai hasashe tun daga Charles Darwin cewa bambance-bambancen kwayoyin halitta zai kasance da amfani ta fuskar dacewar juyin halitta. Muna tsammanin bambance-bambancen kwayoyin halitta na rage yiwuwar gadar kwafin kwayoyin halitta iri daya daga uba da uwa,” in ji Peter Joshi, marubucin farko na binciken, The Independent ta ruwaito.

Marubutan binciken ba su sami wata alaƙa tsakanin bambancin kwayoyin halitta da abubuwan da ke haifar da hawan jini ko matakan cholesterol ba. Wannan ba abin mamaki ba ne idan aka yi la'akari da matsalolin lafiya kamar ciwon sukari, hawan jini, da cututtukan zuciya suna tasowa daga baya a rayuwa. A halin yanzu, juyin halittar ɗan adam ya fi mai da hankali kan ikon ƙirƙirar zuriya masu lafiya da kuma sa su tsira suna ƙanana don ci gaba da renon su.

Kodayake tasirin yana da ɗan ƙaramin ƙarfi, suna goyan bayan ra'ayin cewa haɓaka tsayi da mafi girman hankali abubuwa ne masu kyau na juyin halitta da ake gani a duniya, gami da Turai, Afirka, da Asiya. Sakamakon yana ba da ƙima mai kyau akan bambancin kwayoyin halitta, saboda yana inganta mahimmancin rayuwa. "Wannan binciken yana nuna ikon manyan nazarin kwayoyin halitta don gano muhimman bayanai game da tarihin juyin halitta," in ji Wilson a cikin sanarwar manema labarai.

Yanzu, idan aka zo ga waɗanne ƙungiyoyi ne ke da bambancin jinsi, ana samun yawan jama'ar Turai-Amurka ba su da yawa kuma suna da bambance-bambancen ƙwayoyin cuta masu cutarwa fiye da yawan jama'ar Amurkawa, bisa ga binciken 2008 da aka buga a cikin mujallar Nature. Masu bincike sun yi nuni ga "kwalba" na yawan jama'a wanda mai yiwuwa ya kasance yana da hannu a cikin asali na Turai, don bayyana sakamakon. Wannan yana nufin cewa lokacin da wasu jama'a suka fara raguwa sama da aƙalla tsara ɗaya, ƙananan yawan jama'a suna haifar da raguwar bambancin kwayoyin halitta wanda zai iya haifar da maye gurbin da zai iya shafar amino acid, ko tubalan gina jiki.

Ko kun fito daga asalin jinsin halitta ko ba haka ba, a ƙarshe ko da cututtukan da suka fi dacewa da lafiyar jama'a za su shafi kowa da kowa, tare da bambancin jinsin ba su da wani tasiri.

Sources: Bartz TM, Chasman DI, Concas MP et al. Mallakar shugabanci akan girma da fahimi a cikin ɗimbin mutane. Hali. 2015.

Boyko AR, Bustamante CD, Clark AG et al. Bambance-bambancen dabi'u mafi lalacewa a cikin Turai fiye da na yawan mutanen Afirka. Hali. 2008.

Shahararren taken