Lokacin da ake magana da nau'i na tagwaye, iri biyu an gane su. Aboki na (ko monozygotic ) suna fitowa ne daga takalma guda da aka haifa wanda ya rabu; Abun ƙwararrun mutum (ko dizygotic ) suna fitowa daga jinsuna guda biyu / kwai haɗuwa. Amma jingina ta jiki mai kwakwalwa shine lokacin da aka yi amfani da ita don bayyana wani nau'in nau'i na uku wanda yake faruwa a lokacin da ovum maras yaduwa ya raguwa cikin sassa marasa daidaito sannan kuma kowane ɓangaren ya hadu da kashi biyu a jikinsa guda biyu.
Ta yaya Twin Jumma'a Yayi Magana
Ma'aurata, jima'i na jima'i, sun dauki wani tsari na rarraba da ake kira daji don haifuwa. Tsarin zai haifar da ɗayan 'ya'yan ɗalibai guda hudu, wanda kowannensu yana da rabin saitin chromosomes. Ɗaya daga cikin hudu shine kwayar kwai (oocyte) yayin da sauran uku ake kira ƙwayoyin pola. Yawancin lokaci, kawai anawa ne kawai don haɗuwa, yayin da kwayoyin kwakwalwa suka ƙare. Amma bayan bin ka'idar kwaminisanci na jiki, duka macyse da jikin mai kwakwalwa za su hadu da haɓaka, su haifar da hawaye.
Shin Twins na Maimaita Jumhuriyar Jiki?
Maƙalar motsa jiki ta jiki shine kalma ko ka'idar. Babu lokuta da ake lura da ma'aurata na kwakwalwa ba tare da wata hanya ta gano ko tabbatarwa ba ko kuma karamin mahaifa. Duk da yake yana iya zama mai ban sha'awa don tantance cewa ma'aurata sun kama, amma ba daidai ba ne, babu wata hanya ta san tabbas idan sun kasance tagwaye. Inda gwajin zygosity zai iya tabbatar da cewa ma'aurata sune guda biyu ko ƙananan mahaukaci, kamfanonin da ke gudanar da gwaji na zygosity don ƙayyade nau'i mai nau'in ba su bayar da gwaji ga ma'aurata ba.
Shin Jinsunan Jiki Biyu Na Magana?
Inda mayun ma'aurata sun samo asali ne daga wannan zygote kuma suna da nau'in halitta kamar haka, 'yan biyu na' yan tawaye suna da kimanin rabi na jinsin su na kowa, kamar kowane 'yan uwantaka. Sabili da haka ya biyo bayan mahaifiyar mahaifa suna da irin wannan nau'in kwayoyin halitta daga mahaifiyarsu, amma mafi bambancin jinsin daga mahaifinsu.
A ka'idar, jima'i na kananan kwakwalwa suna raba kashi 75 cikin 100 na alamomin jigilar halittar su, da ƙasa da ma'aurata biyu amma fiye da ma'aurata biyu. Watakila sun yi kama da kamanni, amma ba daidai ba.
An yi amfani da twinning na jiki a cikin wani lokaci kamar yadda yake da haɗin rabi. An rarrabe shi daga jima'i mai mahimmanci, inda ƙwayoyi biyu suka hadu da ƙwai guda don kwai ya hadu kafin hadi. Ko da yake an tabbatar da wani lamuni mai tsaka-tsaka-tsaka-tsaka-tsaka-tsaka-tsaka, ƙwallon ƙarancin jiki yana kasancewa a jimla.
> Sources:
Binciken Twin na Australia. "Mene ne Ma'anar Twinning?" An shiga Fabrairu 12, 2016. http://www.twins.org.au/twins-and-twin-families/twin-resources/faq#twinning
Moskwinski, R., Ed. Twins to Dakatarwa: Cikakken Umurnin Iyaye na Yara da Haihuwar Haihuwa. Harpeth House Publishing: 2002. Print.
> Proactive Genetics. "Mene ne Twins Twins?" An shiga Fabrairu 12, 2016. http://www.proactivegenetics.com/faq-twins-genetics.html#56.
Wells, D. da Hillier, SG "Kwayoyin wutsiya: asalin halittu da kuma ma'anar asibiti." Ƙarƙashin ɗan adam. Volume 17, Issue 5, Mayu 2011.