Zygote: Difference between revisions

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* '''cyclic AMP in the maturation of Ciona intestinalis oocytes'''<ref><pubmed>20810008</pubmed></ref>"Immature oocytes are arrested at prophase I of the meiotic process and maturation onset is indicated by oocyte nuclear disassembly (germinal vesicle breakdown or GVBD). Signaling pathways that elevate intracellular cyclic AMP (cAMP) may either prevent or induce oocyte maturation depending on the species. "
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Revision as of 11:09, 4 October 2010

Introduction

Early zygote.jpg

The first diploid cell that forms following fertilization by fusion of the haploid oocyte (egg) and spermatozoa (sperm) resulting in the combination of their separate genomes. The first image shows the cell with the 2 pronuclei still present before fusion enclosed within the zona pellucida.

Links: Fertilization | Week 1

--Mark Hill 19:07, 5 August 2009 (EST) 19:01, 5 August 2009 (EST) Page under development - notice removed when completed.

Some Recent Findings

  • cyclic AMP in the maturation of Ciona intestinalis oocytes[1]"Immature oocytes are arrested at prophase I of the meiotic process and maturation onset is indicated by oocyte nuclear disassembly (germinal vesicle breakdown or GVBD). Signaling pathways that elevate intracellular cyclic AMP (cAMP) may either prevent or induce oocyte maturation depending on the species. "

Parental Genomes

Labeled parental genomes in an early zygote (mouse)


Parental genome mix 01 icon.jpg Movie of labeled genomes combining during first mitotic divisions in the mouse.

Formation of Zygote

  • male and female pronuclei, 2 nuclei approach each other and nuclear membranes break down
  • DNA replicates, first mitotic division
  • sperm contributes centriole which organizes mitotic spindle

Human zygote two pronuclei 22.jpg Parental genome mix 01 icon.jpg

Movie - Pronuclear Fusion | Movie - Parental Genomes

Conceptus - term refers to all material derived from this fertilized zygote and includes both the embryo and the non-embryonic tissues (placenta, fetal membranes).

References

  1. <pubmed>20810008</pubmed>

Journals

  • Zygote An international journal dedicated to the rapid publication of original research in early embryology, Zygote covers interdisciplinary studies in animals and humans, from gametogenesis through fertilization to gastrulation.

Reviews

Articles

Search Pubmed

June 2010 "zygote" All (6213) Review (651) Free Full Text (1543)

Search Pubmed: zygote


Glossary Links

Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link

Cite this page: Hill, M.A. (2024, March 29) Embryology Zygote. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Zygote

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G