Question

One of these events does not take place during meiosis
A. One successive division without any DNA replication
B. Chiasmata formation and crossing over
C. Segregation of homologous chromosomes
D. Separation of sister chromatids

Answer 1

Hint:
Before we proceed into the problem, it is important to know the definitions of Meiosis. Meiosis and mitosis are the two kinds of cell division. Meiosis is the process by which the parent cell divides twice to produce four daughter cells with only half as much genetic material as the original cell. The daughter cells are hence haploid. Gametes are created by the meiotic process.

Complete answer:
Meiosis is the process that separates chromosomes into two pairs. This results in genetic diseases being passed down from parents to their offspring because mutations happen when this process occurs. So while you may be able to avoid some hereditary risks if you have a healthy diet and lifestyle, it's important to keep track of any potential health concerns. DNA replication is crucial for the survival of cells, and it is repeated multiple times during a cell's life cycle. However, if one division occurs without DNA replication, then the parent cell will not be able to survive. This type of division is called mitotic recombination or meiosis I (M1).
Therefore, the events that do not take place during meiosis are “One successive division without any DNA replication”.

Option ‘A’ is correct

Note:
M1 takes place in the early phases of embryonic development when there are three pairs of chromosomes per nucleus. It results in random genetic changes that allow a particular chromosome to become dominant over other chromosomes. M2 happens later when there are two pairs of chromosomes per nucleus and governs how morphological traits such as appearance and character are genetically determined by inheritable characteristics on Chromosomes No 1, 2, 3.