Fraternal – los yog dizygotic – ntxaib tsim los ntawm ob lub qe uas tau fertilized los ntawm ob leej txiv cov phev, tsim tau ob tug genetic nus muag. Lawv faib 50% ntawm lawv cov DNA. Tab sis "ib nrab zoo ib yam" menyuam ntxaib yog qhov tsawg heev, cov kws tshaj lij hais tias lawv tsuas tau txheeb xyuas ob kis - puas tau.
Vim li cas cov kwv tij ntxaib?
Qhov uas yuav muaj tus menyuam ntxaib zoo ib yam yog qhov tsis tshua muaj: 3 lossis 4 rau txhua 1,000 yug. Fraternal ntxaib tshwm sim thaum ob lub qe sib txawv yog fertilized, txhua tus los ntawm cov phev sib txawv. Qhov no tuaj yeem tshwm sim thaum tus poj niam tsim ntau lub qe (feem ntau ob) tib lub sijhawm. Qhov no hu ua hyperovulation.
Niam ntxaib yog dab tsi?
Monoamniotic-monochorionic Twins Nov yog hom ntxaib uas tsis tshua muaj tshaj plaws, thiab nws txhais tau tias muaj kev pheej hmoo xeeb menyuam vim cov menyuam mos tuaj yeem tangled ntawm lawv tus kheej txoj hlua.
Puas yog kwv tij ntxaib ib txwm?
Nyob ntawm ob ntawm peb pawg ntxaib yog kwv tij. Ob lub qe cais (ova) yog fertilized los ntawm ob lub phev cais, ua rau fraternal los yog 'dizygotic' (ob-cell) ntxaib. Cov me nyuam no yuav tsis zoo ib yam li cov kwv tij yug ntawm nyias lub sij hawm.
Yuav ua li cas yog poj niam los txiv neej tshaj plaws hauv cov kwv tij ntxaib?
Dizygotic Twins thiab Tub los ntxhais
Tus tub-ntxhais ntxaib yog hom menyuam ntxaib dizygotic tshaj plaws, tshwm sim 50% ntawm lub sijhawm. Ntxhais-ntxhais ntxaib yog qhov tshwm sim thib ob. Tub-tub ntxaib yog qhov tsawg tshaj plaws.
