Mapasa ofanana

Mkazi aliyense amalota za kubadwa kwa ana awo, izi kumathandiza kuti akutulukira pa chibadwa pobereka akuchikazi, komanso kukhumba kudziletsa actualization. Ana unachokera mu umodzi linagwira (mapasa ofanana) n'zochepa kwambiri. Mu mfundo za asayansi, Mwina kubereka mapasa imodzi khumi peresenti a. mapasa ofanana ndi kunja pafupifupi osiyana. Mbali imeneyi ndi chifukwa chakuti mapangidwe awo anachokera ku selo limodzi lokha (a zygote) kudzera magawano ake mu magawo oyambirira mimba.

Umuna likulowerera dzira manyowa. mogwirizana kumachitika ndi umuna chimodzi chokha, chimene chimabweretsa ndi genotype Amuna khola cha ziwalo zoberekera wamkazi.

The dzira (zygote) ndi kulalikira mu mphindi Komabe, mchikakamizo cha njira ina iliyonse ndipo n'chifukwa chiyani zimenezi zimachitika mpemphero kwathunthu. Choncho, mapasa anapanga kwa dzira limodzi.

Iwo likukhalira kuti mapasa izi ndizo makope a wina ndi mzake, osati kunja komanso internally. Kafukufuku wasonyeza kuti maperesenti oposa makumi asanu ndi anayi a mapasa ndi osiyana ngakhale Fingerprints.

mapasa ofanana a amuna ndi akazi osiyana kulibeko kuti chifukwa yosavuta kuti genotype zofanana mazira. Mbali yokha ya mapasa umene likhoza kupezeka - ndi mapangidwe mapasa galasi. Pankhaniyi, mmodzi wa ana ndi ufulu chimanjamanja, ndi zina - wamanzere, ndipo Fingerprints pa manja iwo n'zofanana kwa wina ndi mzake. Nthawi zambiri, ziwalo zili m'malo zosiyana. Nthawi zambiri ana amapasa, ngakhale mtundu womwewo wa matenda, chifukwa chimene chingawapangitse kukhala zidakwa kuti pathologies mu zinthu zomwezo. Choona chidwi n'chakuti anthuwo (moyo ndi kukula mu mabanja osiyana) mapasa sikuti ndi zilembo zofanana, koma ngakhale zokonda ndi khalidwe lokonda ena a anthu awo, zimafanana.

ndi mbali ya chitukuko Kodi pali mapasa?

Choyamba, mapasa ofanana m'mimba ndi latuluka wamba, ndipo kachiwiri, chifukwa sanali pachilichonse za kufalitsidwa zambiri amapezeka underdevelopment mmodzi wa iwo. Nthawi zina pali zinthu pamene mismatch wa mpweya machulukitsidwe (oxygenation) magazi ndiwo kwambiri moti munthu wa zipatso (akusowa chakudya) amafa. Komanso, nthaŵi zina n'kotheka chitukuko cha mapasa conjoined (boma limene kulekana wathunthu sichinachitikepo ndi fetuses n'zokhudza mnzake). Pa zabwino, ubale wawo akhoza kukhala kwambiri ndi amenable nkhawa opaleshoni Komabe, zachilendo Zikavuta, ana zinaphatikizidwa mitu, kapena ndi thupi limodzi. Pankhaniyi, opaleshoni kuli kovuta. A bwino pofuna kulekana kwa mapasa ali okhaokha ndipo odziwika bwino.

Kwa amayi ambiri, mapasa ofanana ndi cholinga zofunika Komabe, mapangidwe awo mchikakamizo cha zotsatira chamankhwala kapena osakhala zachipatala sangakhale. Kulekana kwa dzira, amene mapeto mapangidwe mapasa, limapezeka zokha. Pambuyo pogwira akatswiri kuphunzira inapeza kuti pali kutengera za kumtundu kuti n'zotheka kubereka mapasa. Choncho amayi, abale amene ali ndi ana oterewa, Mwina kubereka mapasa, kuphatikizapo zofanana, chabwino pamwamba pa avareji.

Choncho, ngakhale mapasa ofanana ndi ankasirira ndi akazi, kawirikawiri - chilango weniweni. Mavuto yobereka, n'zotheka chitukuko cha mapasa Siamese, ndipo ngakhale imfa ya munthu wa zipatso kuyambitsa mapangidwe chiopsezo chachikulu komanso ana kwa thupi la mayi.