Ob hom loj ntawm meroblastic cleavageyog discoidal thiab superficial. Nyob rau hauv discoidal cleavage, cleavage furrows tsis nkag mus rau lub yolk. Lub embryo tsim ib lub hlwb ntawm lub hlwb, hu ua blastodisc, nyob rau sab saum toj ntawm lub qe.
Dab tsi yog qhov kev txiav txim siab thiab qhov tsis txaus ntseeg?
Vim li no cleavage furrows tuaj yeem tsim tau tsuas yog hauv Page 3 3 thaj tsam disc zoo li tsiaj ncej. Xws li qhov cleavage hu ua discoidal meroblastic cleavage. Piv txwv li: noog thiab tsiaj reptiles. (b) Superficial cleavage - Hauv cov qe centrolecithal, qhov cleavage raug txwv rau peripheral cytoplasm ntawm lub qe. Piv txwv li: kab.
cleavage thiab hom cleavage yog dab tsi?
• Cleavage, a series ntawm mitotic divisions whereby lub enormous . ntim ntawm qe cytoplasm muab faib ua ntau lub me me, nucleated hlwb. • Cov hlwb cleavage-theem no hu ua blastomeres. • Nyob rau hauv feem ntau hom tus nqi ntawm cell division thiab qhov chaw ntawm lub.
Dab tsi yog equatorial cleavage?
Equatorial dav hlau: Lub dav hlau cleavage no bisects lub qe ntawm txoj cai kaum rau lub ntsiab axis. Nws nyob ntawm lub dav hlau equatorial. Nws faib lub qe rau hauv ob halves. 4. Latitudinal dav hlau: Nws zoo ib yam li lub dav hlau equatorial, tab sis nws nyob ntawm ob sab ntawm kab zauv.
Dab tsi yog kauv thiab txiav txim siab cleavage?
Qhov txawv ntawm Kauv Cleavage thiab Radial Cleavage yog qhov ntawd cleavage nyob rau hauv uas lub dav hlau ntawm cell diagonal mus rau ntsug axis ntawm lub embryo yoghu ua Kauv Cleavage thaum lub sij hawm cleavage thaum lub sij hawm lub cleavage dav hlau parallel los yog perpendicular mus rau ntsug axis ntawm lub embryo yog hu ua Radial…
