Yaya Matsayin Mutane da Jajayen Gashi da Shudayen idanu?

Wadatacce

• Ta yaya wani zai sami jan gashi da shudayen idanu
• Wace kwayar halitta ce take haifar da jan gashi?
• Shin masu jajaye, masu shuɗi masu shuɗi za su shuɗe?
• Red gashi, shuɗi idanu a cikin mata vs. maza
• Jan gashi, shuɗun idanu, da hannun hagu

Bayani

A cikin tsararrun launuka masu launuka na gashi, launuka masu duhu sun fi na kowa - fiye da kashi 90 na mutanen duniya suna da launin ruwan kasa ko baƙi. Wannan yana biye da gashi mai farin gashi.

Ja gashi, yana faruwa a cikin yawan jama'a, shine mafi ƙarancin abu. Shudayen idanu ba haka suke ba, kuma suna iya zama da wuya.

Wani bincike ya nuna cewa tsakanin 1899 da 1905, fiye da rabin fararen farar fata wadanda ba yan asalin Hispania ba a Amurka suna da shudayen idanu. Amma daga 1936 zuwa 1951, wannan adadin ya fadi zuwa kashi 33.8. A yau, kimomi sun nuna kusan kashi 17 na mutane a duk duniya suna da shuɗi idanu.

Launin gashinka da launin idanunka sun gangaro zuwa waɗanne kwayoyin halittar da ka gada daga iyayenka. Idan mutum ɗaya yana da gashi ja da shuɗi idanu, akwai kyakkyawar dama ɗaya ko iyayensu biyu za su iya, ma, amma ba koyaushe ba.

Dole ne ku gaji gado guda biyu na bayanan kwayoyin halittar duka launin gashin ku da launin idanun ku don samun wadannan halaye da ba a saba da su ba. Da alama wannan faruwar abu ne mai wuya, musamman idan babu ɗayan iyayenku da suke da jan gashi ko shuɗi.Wasu lokuta, duk da haka, taurarin halittu suna daidaitawa, kuma ana haifar mutane da ƙananan haɗuwa da jan gashi da shuɗi idanu.

Ta yaya wani zai sami jan gashi da shudayen idanu

Abubuwan halayyar halitta sun kasu kashi biyu: sakewa da rinjaye. Iyaye suna raba tsarin fasali da yawa, daga launin gashi zuwa ɗabi'a, a cikin ƙwayoyin halittar su.

Kodayake kwayoyin launi da yawa suna shafar launin gashi, a gaba ɗaya, manyan kwayoyin halitta suna yin nasara a wasan kai-da-kai da ke fuskantar ƙalubalen ƙwayoyin cuta. Gashi mai launin ruwan kasa da idanuwan kasa-kasa, alal misali, dukkansu suna da rinjaye, wanda shine dalilin da ya sa suke da irin wannan adadin na haɗuwar launin ido-ido.

Iyaye na iya zama masu jigilar jigilar kwayoyin halitta. Duk da yake suna iya nuna manyan kwayoyin halittar, amma har yanzu suna da - kuma suna iya wucewa ga yayansu - kwayoyin halittar. Misali, masu launin launin ruwan kasa guda biyu, masu launin ruwan kasa suna iya samun ɗa mai gashi mai launin gashi da shuɗayen idanu.

Duk iyaye biyu na iya nuna halaye masu rikitarwa, kuma suna iya ba da su ga yaransu, suma. Misali, idan iyaye biyu suna da jan gashi, yaro yakan sami mafi yawan bayanan kwayoyin halittar don jan gashi, saboda haka damar da zasu samu jan gashi kusan kashi 100 ne.

Idan ɗayan iyaye sun yi ja kuma ɗayan ba haka ba, damar da ɗansu zai sami jan gashi kusan kashi 50 ne, duk da cewa inuwar jan na iya bambanta sosai.

Aƙarshe, idan iyayen duka suna ɗauke da nau'in kwayar halitta amma basu da jan gashi, yaron yana da kusan 1 cikin 4 damar samun jan gashi da gaske. Hakikanin yanayin gado na launin gashi yana da ɗan rikitarwa, kodayake, tunda akwai ƙwayoyin halittu da yawa da ke tattare da su.

Wace kwayar halitta ce take haifar da jan gashi?

Melanocytes ƙwayoyin melanin ne ke samarwa a cikin fatar ku. Adadin da nau'in melanin da jikin ku yake samarwa yana tantance yadda duhu ko hasken fata zai kasance. Ja gashi shine sakamakon bambancin kwayar halitta wanda ke haifar da ƙwayoyin fata na jiki da ƙwayoyin gashi don samar da nau'ikan nau'ikan melanin musamman na wani.

Yawancin launin ja suna da maye gurbi a cikin mai karɓar melanocortin 1 (MC1R). Lokacin da ba a kashe MC1R, jiki yana samar da pheomelanin, wanda ke da alhakin jan launi da sautunan gashi, fiye da eumelanin, wanda ke da alhakin inuwar launin ruwan kasa da baki. A cikin mutanen da ke tare da MC1R mai aiki, eumelanin na iya daidaita pheomelanin, amma a cikin launin ja, bambancin jinsi ya hana hakan.

Ko kuna da kwaya guda daya ko biyu na kwazon MC1R wanda ba shi da karfi kuma yana iya tantance inuwar jan gashi da kuke da shi, daga launin shuke-shuke zuwa zurfin ciki zuwa mai haske ja. Wannan kwayar halitta tana da alhakin freckles a cikin launuka masu yawa, ma.

Shin masu jajaye, masu shuɗi masu shuɗi za su shuɗe?

Kuna iya gaskanta cewa saboda waɗannan halayen halayen ba su da yawa, ana iya narkar da su daga cikin ɗakunan kwata-kwata gaba ɗaya. Hakan bazai yiwu ba. Ko da lokacin da ba za ka iya ganin halaye na sake komowa ba - jan gashi, misali - har yanzu suna nan, suna buya a cikin chromosomes na mutum.

Lokacin da mutum yana da ɗa, zasu iya ba da labarin asalinsu ga zuriyarsu, kuma halayen zai iya yin nasara. Wannan shine dalilin da ya sa wani abu kamar ja gashi ko shuɗi idanu zai iya “tsallake” tsararraki kuma ya nuna fewan matakai ƙasa da layin iyali.

Red gashi, shuɗi idanu a cikin mata vs. maza

Jan gashi ya fi dacewa ga mata, a cewar. Koyaya, Maza maza yan Caucasian zasu iya samun shuɗayen idanu fiye da mata, nunawa. Dangane da haɗuwar jan gashi da shuɗayen idanu, ƙaramin bincike ya kalli wane jinsi ne mai yuwuwar haɓaka wannan haɗuwa ta al'ada.

Jan gashi, shuɗun idanu, da hannun hagu

Redheads sun san launin gashinsu ba shine kawai keɓaɓɓiyar halayyar ba. A zahiri, jan ja yana da wasu halaye marasa ma'ana.

Iyakance yana ba da shawara cewa jan launin fata na iya zama hagu. Kamar jan gashi, hannun hagu halayyar recessive ce. A yankin yamma, kashi 10 zuwa 15 na mutane suna amfani da hannun hagu da yawa.

Redheads ana tsammanin sun fi saurin jin zafi, suma, nunawa. Ari da, suna iya ƙara sa maye a lokacin aikin tiyata ko maganin sa barci na cikin gida.

Yayinda ake haihuwar jajaye a duk duniya, sunfi yuwuwa a yankin Arewa. Kodayake kusan kashi 1-2% na yawan mutanen duniya suna da jan gashi, wannan adadin ya haura zuwa arewacin kerjin.