Which stage is associated with the formation of chiasmata during meiosis cell division?

Option 3 : Pachytene

The correct answer is Pachytene.

• Pachytene is the stage that is associated with the formation of chiasmata during meiotic cell division.
• Chiasma -
  • a chiasma is the point of contact, the physical link, between two chromatids.
  • A chromosomal crossover is an exchange of genetic material that can occur between both chromatids.
  • This occurs much more during meiosis than mitosis.
• The chiasmata become visible during the diplotene stage of prophase I of meiosis.
• The actual "crossing-overs" of genetic material are thought to occur during the pachytene stage.
• Meiosis subunits (Anaphase I) are the following: (1) Leptotene, (2) Zygotene, (3) Pachytene, (4) Diplotene, and (5) Diakinesis.

• Cell division was first observed by Virchau in 1955 AD.
• Cell division takes place in three ways - Amitosis, Mitosis, and Meiosis.
• The mitosis in animal cells was first observed by Walther Fleming in 1879 and he named it 'Mitosis'.