holoblastic


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holoblastic

 [hol″o-blas´tik]
undergoing cleavage in which the entire oocyte (ovum) participates; completely dividing.

hol·o·blas·tic

(hol'ō-blas'tik),
Denoting the involvement of the entire (isolecithal or moderately telolecithal) oocyte in cleavage.
[holo- + G. blastos, germ]

holoblastic

/holo·blas·tic/ (ho″lo-blas´tik) undergoing cleavage in which the entire zygote participates; dividing completely.

holoblastic

(hŏl′ə-blăs′tĭk, hō′lə-)
adj. Embryology
Exhibiting cleavage in which the entire egg separates into individual blastomeres.

hol′o·blas′ti·cal·ly adv.

holoblastic

[hol′əblas′tik]
Etymology: Gk, holos + blastos, germ
pertaining to an ovum that contains little or no yolk and undergoes total cleavage. Compare meroblastic.

hol·o·blas·tic

(hol'ō-blas'tik)
Denoting the involvement of the entire oocyte in cleavage.
[holo- + G. blastos, germ]

holoblastic

undergoing cleavage in which the entire ovum participates; completely dividing.
References in periodicals archive ?
Janolus fuscus followed the typical holoblastic, spiral cleavage pattern conserved within annelids, molluscs, and nemerteans.
The transition from holoblastic to superficial cleavage was observed in stage 5 of gammarid embryo- genesis (Scholtz and Wolff, 2002; Browne et al.
Cleavage in hydra embryos is holoblastic and unipolar; that is, the cleavage furrow progresses inward from one side of each cell.
Although there is no evidence for the occurrence of a conical rotation in the medaka egg, embryos of some primitive fishes that undergo holoblastic cleavage (species in the Superorder Chondrostei within the Actinopterygii, for example the sturgeon, Acipenser guldenstadti) do form a gray crescent and thus perhaps do undergo a cortical rotation (reviewed by Bolker, 1993; see also Clavert, 1962; Ginsburg and Dettlaff, 1991).
retortiformis eggs, early cell divisions were holoblastic, and gastrulation was similar to that in indirect-developing embryos containing less yolk.