Zygotene - Wikipedia
网页Zygotene (from greek "paired threads" [1]) is the second stage of prophase I during meiosis, the specialized cell division that reduces the chromosome number by half to produce haploid gametes. It follows the Leptotene stage and is followed by Pachytene stage.
Meiosis - Wikipedia
网页In Zygotene (Z), the transverse elements (SYCP1) and central elements of the synaptonemal complex are partially installed (appearing as yellow as they overlap with SYCP3). In Pachytene (P), it is fully installed except on the sex chromosomes.
Prophase I - Definition, Stages and Quiz | Biology Dictionary
网页2020年10月27日 · Leptotene is often named in unison with the following stage as the Leptotene-Zygotene transition, as the first stage is in itself a very short process. The image below shows all five stages of Prophase I, starting with leptotene at the top.
Substages of Prophase I - Online Biology Dictionary - macroevolution
网页In oocytes, a special, extremely prolonged form of diplotene occurs called dictyotene. The primary oocyte undergoes the first three of the substages of prophase I (leptotene, zygotene, and pachytene) during late fetal life. The process is then suspended during diplotene until puberty or thereafter.
What is Zygotene? - BYJU'S
网页Zygotene is the second stage of meiosis prophase-1. It is preceded by the leptotene stage, where uncoiling and condensing of chromosomes takes place. In the zygotene stage, homologous chromosomes (one from mother and one from father) come together and pair.
Prophase I - Definition and Examples - Biology Online Dictionary
网页2023年5月29日 · Prophase I is the first stage in the first meiotic division (meiosis I) characterized by having five sub-stages namely leptotene, zygotene, pachytene, diplotene, and diakinesis, and essential mainly for the exchange of DNA between homologous chromosomes via a process called homologous recombination and the crossover at …
Zygotene Definition & Meaning - Merriam-Webster
网页The meaning of ZYGOTENE is the stage of meiotic prophase which immediately follows the leptotene and during which synapsis of homologous chromosomes occurs.
2.3: Meiosis - Biology LibreTexts
网页2023年6月20日 · In meiosis, Prophase I is divided up into five visual stages, that are steps along a continuum of events. Leptotene, zygotene, pachytene, diplotene and diakinesis. From interphase, a cell enters as the nuclear material begins to condense into long visible threads (chromosomes).
Meiosis 1 - The Different Phases of Meiosis 1 Cell Division - BYJU'S
网页In zygotene, the pairing of homologous chromosomes starts a process known as chromosomal synapsis, accompanied by the formation of a complex structure called synaptonemal complex. A pair of synapsed homologous chromosome forms a complex known as bivalent or tetrad.
8.3: Meiotic Recombination - Biology LibreTexts
网页2023年6月20日 · During the meiosis I, the homologous chromosomes align and then separate. At the zygotene stage, the two homologous chromosomes, each with two sister chromatids, pair along their length in a process called synapsis. The resulting group of four chromatids is called a tetrad or bivalent.