indeterminate cleavage
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indeterminate cleavage — n cleavage in which all the early divisions produce blastomeres with the potencies of the entire zygote compare DETERMINATE CLEAVAGE * * * division of the zygote that follows a less rigid cleavage pattern, the blastomeres having more… … Medical dictionary
indeterminate cleavage — n. Zool. the division of an egg into cells, each of which has the potential of developing into a complete organism: cf. TWINNING (sense 1) … English World dictionary
indeterminate cleavage — noun : cleavage in which all the early cleavage cells possess the potencies of the entire zygote compare determinate cleavage … Useful english dictionary
indeterminate — in·de·ter·mi·nate .in di tərm (ə )nət adj relating to, being, or undergoing indeterminate cleavage <an indeterminate egg> … Medical dictionary
Cleavage (embryo) — In embryology, cleavage is the division of cells in the early embryo. The zygotes of many species undergo rapid cell cycles with no significant growth, producing a cluster of cells the same size as the original zygote. The different cells derived … Wikipedia
cleavage — 1. Series of mitotic cell divisions occurring in the ovum immediately following its fertilization. SYN: segmentation (2). SEE ALSO: c. division. 2. Splitting of a complex molecule into two or more simpler molecules. SYN: scission (2). 3 … Medical dictionary
determinate cleavage — n cleavage of an egg in which each division irreversibly separates portions of the zygote with specific potencies for further development compare INDETERMINATE CLEAVAGE * * * cleavage following a precise pattern, each blastomere having a… … Medical dictionary
determinate cleavage — noun : cleavage (sense 4a) in which each cell division irreversibly separates portions of the zygote with specific and distinct potencies for further development compare indeterminate cleavage, mosaicism … Useful english dictionary
annelid — /an l id/, n. 1. any segmented worm of the phylum Annelida, including the earthworms, leeches, and various marine forms. adj. 2. belonging or pertaining to the Annelida. Also, annelidan /euh nel i dn/. [1825 35; see ANNELIDA] * * * Any member of… … Universalium
Deuterostome — Deuterostomes Temporal range: Late Ediacaran – Recent … Wikipedia
