Nyob hauv 99.9% ntawm cov tub/ntxhais ntxaib tsis zoo ib yamTxawm li cas los xij, qee qhov tsis tshua muaj tshwm sim los ntawm kev hloov caj ces, cov menyuam ntxaib zoo tib yam los ntawm lub qe thiab cov phev uas tau pib. raws li txiv neej (XY) tuaj yeem ua rau txiv neej / poj niam khub. … Cov caj ces ib txwm ua ntawm ib tug ntxhais yog XX.
Ib tug tub thiab tus ntxhais ntxaib puas tuaj yeem nyob hauv tib lub hnab?
Ib yam, lossis monozygotic, ntxaib yuav lossis tsis tuaj yeem sib koom tib lub hnab amniotic, nyob ntawm seb lub qe fertilized thaum ntxov muab faib ua 2. Yog menyuam ntxaib yog ib tug tub thiab ib tug. hluas nkauj, qhia meej tias lawv yog kwv tij ntxaib, vim lawv tsis muaj DNA tib yam.
Puas yog cov menyuam ntxaib zoo tib yam nkaus xwb?
Ib leeg ntxaib, lossis cov menyuam ntxaib monozygotic, tshwm sim thaum ib lub qe yog fertilized los ntawm ib tug phev. Qee lub sij hawm thaum thawj ob peb lub lis piam tom qab xeeb tub, lub qe sib cais hauv ib nrab, ua rau ob tug me nyuam zoo tib yam. Ob tug menyuam ntxaib no ib txwm yog poj niam los txiv neej, ob tug ntxhais los yog ob tug tub.
3 hom ntxaib yog dab tsi?
Hom Twins: Kwv tij, Ib yam, thiab Ntau
- Nkauj ntxaib (Dizygotic)
- Identical Twins (Monozygotic)
- Txiv ntxaib.
- Pob ntxaib Qhia ib lub placenta thiab Amniotic Sac?
- Yuav ua li cas muaj menyuam ntxaib?
Yuav ua li cas yog poj niam los txiv neej tshaj plaws nyob rau hauv tib tug ntxaib?
Ntawm no yog koj qhov txawv txav:
- Tub-ntxhais ntxaib yog cov menyuam ntxaib kiv taub hau 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.
