Question

Which of the following is not a feature of meiosis?
A) Meiosis involves two sequential cycles of nuclear and cell division, meiosis I and meiosis II but only a single cycle of DNA replication.
B) Meiosis I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S-phase.
C) Meiosis involves pairing of non-homologous chromosomes and recombination between them.
D) Four haploid cells are formed at the end of meiosis II.

Answer 1

The DNA in the cell is repeated in Meiosis I, leading to two matching complete sets of chromosomes. Two centrosomes are outside the nucleus, each holding a pair of centrioles, and these frameworks are essential for the cell division process.

Complete answer:
Meiosis is a mechanism in which four cells comprising half the original volume of genetic material are generated by a single cell that divides twice. These cells are our reproductive cells: males' sperm, females' eggs.

Now, let us find the solution from the options-
-As we know, meiosis is termed a reduction division, in which the number of chromosomes from parent cell to daughter cell is reduced to half.
-This entails two cycles: Meiosis I and Meiosis II, in which nuclear and cell division occurs, but only after DNA replication occurs.
-The DNA replication of the parent material occurs during meiosis after the cell has concluded and thus similar sister chromatids are produced.
- Although it is a reductional division, we realize that four daughter cells are produced with half the amount of parent cell chromosomes.
- Besides that, the pairing of non-homologous chromosomes is never involved in Meiosis and no recombination happens between them.

Thus, the correct answer is option (C) Meiosis involves pairing of non-homologous chromosomes and recombination between them.

Note: In Meiosis II, the chromosomes again condense into recognizable X-shaped forms in each of the two daughter cells that can be clearly identified under a microscope. The membrane in each daughter cell around the nucleus dissolves, freeing the chromosomes.