During prophase 1 of meiosis
![during prophase 1 of meiosis during prophase 1 of meiosis](https://biologydictionary.net/wp-content/uploads/2019/05/Meiosis-I-Stages-768x463.jpg)
Prophase occurs in both meiosis and mitosis but Prophase 1 (as a stage) only occurs in meiosis. Homologous chromosomes pair and link up, creating synapses during meiosis prophase 1, a process that only occurs during meiosis. Prophase one (Prophase I) and Prophase two (Prophase II). Homologous chromosomes come together to form pairs and appear as bivalentsįigure 1.
![during prophase 1 of meiosis during prophase 1 of meiosis](https://www.thoughtco.com/thmb/aYNVTgNUSn3kIbq7KcUwkLH71Eg=/1500x1000/filters:no_upscale():max_bytes(150000):strip_icc()/Meiosis-Prophase-I-58dc0aee3df78c516271fafe.jpg)
![during prophase 1 of meiosis during prophase 1 of meiosis](https://hi-static.z-dn.net/files/dfb/7d9fa9795f0e6b39971ae49cd4268efb.png)
There are two successive nuclear divisions: meiosis I and meiosis II.Įach of them has four major phases. Meiosis is a specialized form of cell division that ultimately gives rise to non-identical haploid gametes (or haploid sex cells). Prophase I precedes metaphase I, a stage that features homologous chromosomes aligning along a single plane in the center of the cell.īefore we move on and become acquainted with the various substages of prophase I, let us first understand some basic concepts. This stage then ends with the disintegration of the nucleolus and the nuclear membrane. Thus, this stage is important to increase genetic variation. Prophase I highlights the exchange of DNA between paired chromosomes via a process called homologous recombination and the crossover at chiasmata (singular: chiasma) between non-sister chromatids. This stage is characterized by five stages, namely leptotene, zygotene, pachytene, diplotene, and diakinesis, that make it up. Prophase I is the first stage of meiosis I. Let’s read on to find answers to what is prophase 1, what happens in prophase 1, and what is the importance of prophase 1. This includes prophase, which consists of prophase 1 (for meiosis 1) and prophase 2 (for meiosis 2). The stages of meiosis 1 (or meiosis I) are named after the first process and the same occurs for meiosis 2 ( meiosis II).