Ndeupi ziso ruvara mwana?

Panongotanga mwana anouya munyika ino, vanasekuru, shamwari neshamwari, vanatete nanasekuru, uye chokwadi, vabereki vatsva pachavo vari kushamisika nezvake kuti kuita pipsqueak. Waaniko iye mhino, muromo, matama. Uye mumwe wemibvunzo chikuru ndechokuti: "Chii ruvara kwemaziso ndiye mwana?" Ko vabereki rutema takangwaririra kuoneka kareglazka musikana? Kana peya rima takangwaririra - mukomana mitema maziso? Ngatitaurei kubata!

Chii chinoratidza kuti ruvara kwemaziso muvana? Mhinduro unequivocal pano haagoni kuva, pashure zvose, zvinenge 90%, uye ipapo anosarudza genetics, dzasara 10% zvichiri kuvimba nyaya.

Ruvara kwevanhu ziso pakutsvaga chitsama ruvara pasi zita "rwe-melanin" iri Iris pakati ziso. Shoma Huwandu rwe-melanin - zvinoreva ziso ruvara rwebhuruu, kufadza mari - mashava. Mamwe mavara uye noruvara dziri pakati maviri pfungwa yacho chakarondedzera. Huwandu ruvara iri zvinoberekeswa kwakatemwa.

vana vachangoberekwa All vane kana shava kana vachena rwebhuruu maziso. Zvadaro, zvichienderana nokukurumidza uye uwandu rwe-melanin zvinoberekwa muviri, ziso ruvara change. Pakupedzisira, ona chii ruvara maziso zvichaitawo mwana, zvinokwanisika kuti vabudirire makore matatu. zvinogona kuchinja kuti zera iri, asi vakawanda vana pachena pazera kwemwedzi mitanhatu kusvikira makore. Pane kunze mutemo: kune vanhu vane ziso ruvara nokuchinja kwoupenyu.

Error ndiyo inoti kana vabereki vose vane shava achishamisika mwana anofanira kuva ziso ruvara. Vakashamiswa kuti anozvarwa, mwana rwebhuruu achishamisika. Mhuri dzakawanda sei yarega nokuda Pakadaro, kana vanhu havana humbowo pane genetics. Chokwadi, kunyumwira weveta mukadzi. Zvichakadai, zviri zvakanaka nyore. Ngatimbokurukurai imwe muenzaniso ano chikoro bhuku iri zvipenyu nyore.

Ndeupi ziso ruvara mwana? Zvokufungidzira pachine hakushandi. Mumwe munhu ane dzakasiyana maviri chete Gene: rwaamai uye yemadzibaba. Two shanduro majini zvinonzi alleles. Mumwe wavo ndihwo, mumwe - recessive. Saka, shava ziso ruvara - zvakazara. Asi mwana kuwana recessive allele uye mumwe vabereki.

Kureva shava ziso ruvara tsamba "K", uye ruvara rwebhuruu, riri recessive, duku "g". Nokuti ziso ruvara muvanhu mutoro mubatanidzwa alleles maviri - mumwe mubereki mumwe. Saka, zvisvundu achishamisika munhu kana mubatanidzwa "CC" kana "KG". In mwana rwebhuruu achishamisika zvinozoita chete kuva "makore".

The mwana anogona kuva maziso ebhuruu, kana vose vabereki rima takangwaririra kukwana kutonga Hazel ruvara, kureva zvose allele "KG". Nemamwe mashoko, kana mbuya kana mwana rwebhuruu maziso sekuru vangu, muzukuru, pangava zvakanaka kuva rwebhuruu takangwaririra!

Mhamha "KG" + Baba "KG" = KK (brown takangwaririra mwana) kana KG (brown takangwaririra mwana) kana makore (zvitema takangwaririra).

Nhasi, kune kunyange mhando Converter kuona chii ruvara maziso ane mwana. Chokwadi, tsananguro wedu schematic chaizvo uye hazviratidzi kunzwisisa kwakaita masero kwendangariro. Kunyange zvakadaro, kubata pamuviri uye kukura mwana - chakavanzika chikuru, uye pfungwa dzedu havagoni kuziva nguva dzose. Chii ruvara Meso zvichaita mwana - zvichikosha kuti zvinokosha? Chinonyanya kukosha ndechokuti, kuti akanga utano uye akararama upenyu hunofadza, handiti?