Centrolecithal (Greek kentron = center of a circle, lekithos = yolk) describes the placement of the yolk in the centre of the cytoplasm of ova.[1] Many arthropod eggs are centrolecithal.[2]
During cytokinesis, centrolecithal zygotes undergo meroblastic cleavage, where the cleavage plane extends only to the accumulated yolk and is superficial. This is due to the large dense yolk found within centrolecithal eggs and triggers a delayed embryonic development.
See also
editReferences
edit- ^ Ryder, John A. (1883). "The Law of Nuclear Displacement, and Its Significance in Embryology". Science. 1 (10): 273–277. Bibcode:1883Sci.....1..273R. doi:10.1126/science.ns-1.10.273. ISSN 0036-8075. JSTOR 1759005. PMID 17771470.
- ^ Müller, Yara; Ammar, Dib; Nazari, Evelise (March 2004). "Embryonic development of four species of palaemonid prawns (Crustacea, Decapoda): pre-naupliar, naupliar and post-naupliar periods". Revista Brasileira de Zoologia. 21: 27–32. doi:10.1590/S0101-81752004000100005. ISSN 0101-8175.
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