Irregularities in Meiotic Prophase I
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  • Release Date: 07 Apr 2023
  • meiosis
  • gametogenesis
  • synapsis
  • synaptonemal complex
  • Ellobius tancrei
Video Introduction

This video is adapted from 10.3390/d15030364

Heredity and variability (“descent with modification” per Charles Darwin) are the two basic phenomena behind speciation. Chromosomes, as carriers of genetic material, provide the precise inheritance of DNA. Through homologous recombination, genetic diversity increases. In the event of a deleterious mutation, a gametogenesis fail occurs, mainly in meiosis through the checkpoint systems that eliminate defective cells during certain meiotic stages. This distinctive feature of speciation, in which divergence is ensured by chromosome mutations (changes in the structure and/or number of chromosomes), establishes postzygotic reproductive isolation due to the sterility or decreased fertility of hybrids.

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Matveevsky, S.; Kolomiets, O.; Bakloushinskaya, I.; Pankin, M.; Tambovtseva, V. Irregularities in Meiotic Prophase I. Encyclopedia. Available online: (accessed on 29 February 2024).
Matveevsky S, Kolomiets O, Bakloushinskaya I, Pankin M, Tambovtseva V. Irregularities in Meiotic Prophase I. Encyclopedia. Available at: Accessed February 29, 2024.
Matveevsky, Sergey, Oxana Kolomiets, Irina Bakloushinskaya, Mark Pankin, Valentina Tambovtseva. "Irregularities in Meiotic Prophase I" Encyclopedia, (accessed February 29, 2024).
Matveevsky, S., Kolomiets, O., Bakloushinskaya, I., Pankin, M., & Tambovtseva, V. (2023, April 07). Irregularities in Meiotic Prophase I. In Encyclopedia.
Matveevsky, Sergey, et al. "Irregularities in Meiotic Prophase I." Encyclopedia. Web. 07 April, 2023.