- One meiotic division (to produce microspores)- Two mitotic divisions (one for the microspore to form vegetative and generative cells, and one for the generative cell to form two male gametes) Conclusion:The complete development of the male gametophyte from the pollen mother cell involves one ...
Related to Mitotic division: meiotic divisionmitosis mi·to·sis (mī-tō′sĭs) n. pl. mi·to·ses (-sēz) Biology 1. The process in cell division by which the nucleus divides, typically consisting of four stages, prophase, metaphase, anaphase, and telophase, and normally resulting in ...
Coevolution of the mitotic and meiotic modes of eukaryotic cellular division Physical Review E(IF2.2)Pub Date : Valmir C. Barbosa, Raul Donangelo, and Sergio R. Souza The genetic material of a eukaryotic cell (one whose nucleus and other organelles, including mitochondria, are enclosed within m...
Referring to cells (for example, neurons) that do not exhibit mitosis and cell division after fetal development is complete. Farlex Partner Medical Dictionary © Farlex 2012 Want to thank TFD for its existence?Tell a friend about us, add a link to this page, or visitthe webmaster's page ...
I.A. Crossing-Over and Chiasmata Two types of cell division are known for eukaryotic organisms: mitotic and meiotic. Recombination takes place in both. In cells that enter meiosis, the chromosomes have already undergone DNA replication so that each chromosome consists of two sister chromatids con...
To determine whether the meiotic defects observed in germ cells corresponds to a mitotic defect in somatic cells, we used MEFs, where cell cycle alterations can be studied in greater detail than in vivo. We prepared MEFs from β-Trcp1+/+ and β-Trcp1−/− embryos and examined their cel...
What are the steps in mitotic cell division, and how do they differ from the steps in meiotic cell division? Explain the process of cell division in animals. Include a description of interphase, mitosis, and cytokinesis. Identify and describe the stages of cell division. ...
most commonly the oocyte’s meiotic divisions4,5,6. Such errors involve nondisjunction of bivalents and premature separation of sister chromatids, arising from improper chromosome-spindle attachments and/or age-dependent weakening of cohesion5,7,8,9. Gain of an extra chromosome 13, 18 or 21 in...
2006). In meiotic Xenopus egg extracts, these new microtubules grow at small angles and with the same polarity as the mother microtubule, which makes them suitable to generate parallel microtubule bundles such as kinetochore fibers (Petry et al. 2013). This mechanism may be at work also in ...
The transition from meiotic to mitotic spindle assembly is gradual during early mammalian development. J. Cell Biol. 198, 357–370 (2012). Article CAS PubMed PubMed Central Google Scholar Crowder, M. E. et al. A comparative analysis of spindle morphometrics across metazoans. Curr. Biol. 25...