Holoblastic yog dab tsi?
Holoblastic yog dab tsi?

Video: Holoblastic yog dab tsi?

Video: Holoblastic yog dab tsi?
Video: Xwm Kab Yog Dab Tsi? ( Xwm Kab ) - By Hmong Inspiration 2024, Kaum ib hlis
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Kev txhais ntawm holoblastic .: tus cwj pwm los ntawm kev ua tiav cleavage uas faib tag nrho lub qe rau hauv qhov sib txawv thiab cais blastomeres - piv meroblastic.

Ua kom pom qhov no, Holoblastic cleavage piav qhia li cas?

Holoblastic cleavage . (embryology) Kev faib ua tiav ntawm lub qe isolecithal lossis microlecithal qe rau hauv blastomeres. Nyob ntawm feem ntau ntawm cov yolk nyob rau hauv lub qe, lub kev tawg tuaj yeem yog holoblastic los yog meroblastic. Cov holoblastic hom ntawm cleavage feem ntau pom nyob rau hauv cov qe uas muaj nruab nrab mus rau sparse npaum li cas ntawm yolk.

Qhov thib ob, Holoblastic thiab Meroblastic yog dab tsi? Txhais. Holoblastic cleavage yog hais txog kev faib ua tiav ntawm isolecithal lossis mesolecithal qe rau hauv blastomeres thaum meroblastic cleavage yog hais txog qhov tsis tiav cleavage nyob rau hauv telolecithal los yog centrolecithal qe uas ua rau tsis sib xws blastomeres.

Hauv qhov no, tib neeg puas yog Holoblastic lossis Meroblastic?

Hauv placental mammals (xws li tib neeg) qhov twg cov khoom noj yog muab los ntawm leej niam lub cev, cov qe muaj me me ntawm cov qe qe thiab undergo holoblastic. kev tawg . Lwm hom, xws li noog, nrog ntau lub qe nyob rau hauv lub qe los txhawb lub embryo thaum lub sij hawm kev loj hlob, undergo meroblastic. cleavage.

Hom kev cleavage dab tsi uas tib neeg muaj?

Hauv tib neeg zygot ua cleavage yog radial (blastomeres yog teem nyob rau hauv radial dav hlau nyob ib ncig ntawm lub polar axis) thiab indeterminate hom (Txoj hmoo ntawm txhua blastomere tsis tau txiav txim siab).

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