نتایج جستجو برای: blastomeres
تعداد نتایج: 1284 فیلتر نتایج به سال:
Blastomeres isolated from 4- and 8-cell mouse eggs were inserted into empty zonae and transferred to the oviduct. The products of both types of blastomere were capable of inducing decidual formation. One implant produced by an isolated blastomere from a 4-cell egg contained a small, retarded embryo at 5 1/2 days but most decidua from blastomeres of either 4- or 8-cell eggs contained only a few ...
Ascidian eggs develop into tadpole larvae. They have a simple central nervous system (CNS) at the dorsal midline. The CNS is formed through neural tube formation at the neurula stage, as in vertebrates. The total number of cells in the CNS is approximately 300. In Halocynthia roretzi, the anterior part of the CNS, which consists of the brain (sensory vesicle) and the visceral ganglion, is exclu...
STUDY QUESTION What is the reliability of preimplantation genetic diagnosis (PGD) based on polar body (PB), blastomere or trophectoderm (TE) analysis in a heteroplasmic mitochondrial mouse model? SUMMARY ANSWER The reliability of PGD to determine the level of mitochondrial DNA (mtDNA) heteroplasmy is questionable based on either the first or second PB analysis; however, PGD based on blastomer...
The polarization of the embryonic axes is a key event in embryogenesis, being one of the earliest manifestations of the shape and form of the organism. The acquisition of polarity by individual blastomeres is one of the earliest indicators of commitment t o a particular pathway of differentiation. These phenomena have been studied in the development of C. elegans both at the cellular and organi...
In the present study, we successfully cryopreserved entire blastoderms of rainbow trout, Oncorhynchus mykiss, embryos being at around midblastula stage of development. The method is a potential alternative to cryopreserving the whole fish embryo, not successful so far. key words. Blastoderm Blastomeres cryopreservation embryonic cells Trout. Cybium 2008, 32(2) suppl.: 139-141. (1) Faculty of Bi...
The nuclei of preimplantation mouse embryos were identified after labelling with either DAPI or Hoechst 33258. During the 4- and 8-cell stages the peripherally located nuclei become clustered nearer the centre of the embryo. This nuclear migration towards the base of each cell was also observed during the development of couplets of 2/4 and 2/8 cells. Most blastomeres isolated from compact 8-cel...
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