Question

Meiosis is best seen in
A. Microsporocytes
B. Pollen grain
C. Gamete
D. Anther wall

Answer 1

Hint: Meiosis is a process of cell division which reduces the two sets of chromosomes in the parent cell and generates four gamete cells. This cycle is essential for the development of egg and sperm cells for reproduction.

Complete answer:
The formation of microspores from microsporocytes is called microsporogenesis. Microspores have a single set of chromosomes and are developed by meiosis from microsporocytes having pairs of chromosomes. Microspore has three different types of wall layers. The outer layer is called the perispore, the next is the exospore, and the inner layer is the endospore. The perispore is the thickest of the three layers, while the exospore and endospore are relatively equal in width. Meiosis is best seen from the differentiation of microsporocytes. Microsporocytes or microspores of the parent cell following meiosis inevitably lead to microspores. Certain cells do not separate meiotic division. In the current research, meiosis in microsporocytes was examined. The analysis reveals that substantial illegitimate coupling has happened between non-homologous chromosome segments of pachytene. These interactions were indistinguishable from the pairing of homologous chromosome sections, but no more than two chromosome segments are paired at any particular moment in time. A grain of pollen is a male gametophyte and pollen grains are developed in the anthers, the male portion of the flowers. Meiosis occurs in the anthers. Pollen mother cells undergo meiosis.
So, the correct answer is option (A).

Note: Microsporocytes are the best example where the meiosis process occurs clearly. If cytokinesis occurs following meiosis I, then microsporogenesis is a successor. Successive microsporogenesis leads to two meiosis I cells and four meiosis II cell types. If cytokinesis occurs after the meiosis II, then microsporogenesis usually coincides. Concurrent microsporogenesis results in the generation of cells just after meiosis II.