Dab tsi yog tus lej 2n chromosome rau koj karyotype?
Dab tsi yog tus lej 2n chromosome rau koj karyotype?

Video: Dab tsi yog tus lej 2n chromosome rau koj karyotype?

Video: Dab tsi yog tus lej 2n chromosome rau koj karyotype?
Video: 40 tsuas yog tus lej tsom xyooj nkauj tawm tshiab 2023 2024, Kaum ib hlis
Anonim

Qhov yooj yim tus lej ntawm chromosomes nyob rau hauv lub somatic hlwb ntawm ib tug neeg los yog ib hom yog hu ua lub somatic tus lej thiab raug xaiv 2 ib n . Hauv kab kab mob (cov kab mob sib deev) lub tus lej chromosome yog n (neeg: n = 23). Yog li ntawd, nyob rau hauv tib neeg 2 ib n = 46.

Tsuas yog li ntawd, tus lej diploid chromosome yog dab tsi rau koj karyotype?

Piv txwv li, ib tug haploid human nucleus (piv txwv li phev los yog qe) ib txwm muaj 23 chromosomes (n=23), thiab a diploid tib neeg nucleus muaj 23 khub ntawm chromosomes (2n = 46). A karyotype yog cov ua tiav ntawm chromosomes ntawm tus kheej.

Ib tug kuj nug, dab tsi yog 2n chromosome naj npawb ntawm Valanga? Valanga nigricornis muaj cov lus qhia ntxiv rau tus tswv cuab ntawm Cryptosacci, uas yog, txiv neej muaj 2 n = 22 + X qhov twg tag nrho cov chromosomes yog telocentric.

Hais txog qhov no, koj yuav nrhiav tau tus lej 2n chromosome li cas?

Cov tus lej ntawm chromosomes tsis cuam tshuam nrog qhov pom tseeb ntawm cov tsiaj lossis cov nroj tsuag: hauv tib neeg, piv txwv li, diploid tus lej yog 2 ib n = 46 (uas yog, 23 khub), piv nrog 2 ib n = 78, los yog 39 khub, hauv tus dev thiab 2 ib n = 36 (18) in the common earthworm.

2n txhais li cas?

- Genomic (X) tus lej yog ib pawg ntawm cov chromosomes sib txawv 2 N = tus naj npawb ntawm chromosomes hauv somatic hlwb (somatic chromosome tooj)

Pom zoo: