1 Department of Midwifery, University of West Attica, Athens, Greece.
2 Department of Electrical and Computer Engineering National Technical University of Athens, Greece.
3 Department of Midwifery, University of Western Macedonia, Ptolemaida, Greece.
Review Article
World Journal of Advanced Research and Reviews, 2023, 17(03), 861-863
Article DOI: 10.30574/wjarr.2023.17.3.0468
Received on 12 February 2023; revised on 23 March 2023; accepted on 26 March 2023
This commentary was mainly written to clarify a fundamental concept related to meiosis, which is the type of cell division for the production of gametes. Meiosis consists of two nuclear and cell divisions without an intermediate phase, starting with a diploid cell while giving rise to four haploid cells. Each division (meiosis I and meiosis II) consists of four stages: a) prophase, b) metaphase, c) anaphase and d) telophase. Recently, we noticed that there is an error in some schematic diagrams depicting meiosis I. These diagrams connect oocytes and polar bodies in different ways. For example, in a recent article, we noticed that in both the text and the schematic diagram “primary oocyte” and “polar body I” and “secondary oocyte” and “polar body II” appear in parallel. However, this is incorrect. Actually, the secondary (not primary) oocyte corresponds to polar body I. This is a fundamental knowledge that is necessary to understand the whole miracle of meiosis and the steps of preimplantation genetic testing.
Oocytes; Meiosis; Prophase; Metaphase
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Georgios Iatrakis, Dimitrios Iatrakis, Eirini Orovou and Evangelia Antoniou. Meiosis and preimplantation genetic testing. World Journal of Advanced Research and Reviews, 2023, 17(3), 861-863. Article DOI: https://doi.org/10.30574/wjarr.2023.17.3.0468