What is the Difference Between Pachytene and Zygotene?
🆚 Go to Comparative Table 🆚Pachytene and zygotene are two sub-stages of prophase 1 in meiotic cell division. The main differences between them are:
- Order: Zygotene is the second sub-stage of prophase 1, while pachytene is the third sub-stage of prophase 1.
- Events: In zygotene, synapsis begins with the formation of a synaptonemal complex between homologous chromosomes. In pachytene, crossing over of genetic material occurs between non-sister chromatids, leading to the exchange of genetic material and causing genetic variation between organisms.
In summary, zygotene is characterized by the pairing of homologous chromosomes and the formation of synaptonemal complexes, while pachytene involves the crossing over of genetic material between non-sister chromatids, resulting in genetic variation.
On this pageWhat is the Difference Between Pachytene and Zygotene? Comparative Table: Pachytene vs Zygotene
Comparative Table: Pachytene vs Zygotene
Here is a table comparing the differences between pachytene and zygotene:
Feature | Pachytene | Zygotene |
---|---|---|
Stage | Third sub-stage of prophase 1 meiosis | Second sub-stage of prophase 1 meiosis |
Synapsis | Occurs between non-sister chromatids of bivalents | Begins in homologous chromosomes |
Chromosome Pairing | Chromosomes are still in the process of pairing | Paired homologous chromosomes are closer together |
Chromatin Condensation | Occurs | Does not occur |
Crossing Over | Yes, between non-sister chromatids | No |
Order in Meiosis | Follows zygotene | Precedes pachytene |
Both pachytene and zygotene are stages in prophase 1 of meiosis, which is a type of cell division that occurs during sexual reproduction to produce sex cells or gametes.
Read more:
- Pachytene vs Diplotene
- Leptotene vs Zygotene
- Diplotene vs Diakinesis
- Sporogony vs Schizogony
- Zoospore vs Zygote
- Embryo vs Zygote
- Prophase vs Metaphase
- Telophase vs Cytokinesis
- Gametic Sporic vs Zygotic Meiosis
- Prophase I vs Prophase II
- Zoospore vs Zygospore
- Telophase 1 vs 2
- Tachyzoite vs Bradyzoite Stages
- Sporogenesis vs Gametogenesis
- Prezygotic vs Postzygotic
- Interphase vs Prophase
- Karyokinesis vs Cytokinesis
- Actinomorphic vs Zygomorphic Flower
- Meiosis vs Gametogenesis