Question

Which of the following is not a characteristic of meiosis?
A. It involves two stages of DNA replication, one before meiosis I and another before meiosis II.
B. It involves recombination and crossing over.
C. Sister Chromatids separate during anaphase II.
D. Nuclear membrane disappears during prophase.

Answer 1

Hint: Meiosis is a kind of cell division in which a parent cell splits into four daughter cells, each with half the number of chromosomes as the parent cell. The procedure is critical for keeping the chromosomal number consistent between generations.

Complete step by step answer:
Although DNA replication happens just once, meiosis contains two M-phases, each with its karyokinesis and cytokinesis. The transition from M-phase I (meiosis I) to M-phase II (meiosis II) is brief and devoid of DNA replication. It is known as interkinesis. Considering the other statements: -The two processes that result in genetic variations are recombination and crossing over. It happens during Prophase I of meiosis. The procedure takes place in sex cells.
The second step of meiosis is anaphase. The homologous chromosomes are dragged apart to the poles of the nucleus during this process; at this point, the sister chromatids of these chromosomes do not remain linked.
Prophase is the initial stage of meiosis, during which the nuclear membrane begins to dissolve and disintegrate, the chromosomes condensate, and the nucleolus dissolves. It is the process through which cells prepare for division.
Hence, the correct answer is Option A .

Note: Meiosis is a type of reproduction. One of the two cells divides into two cells, and it only happens in sexually reproducing organisms. Meiosis occurs in sexually reproducing organisms because it provides genetic diversity, which is necessary for sexual reproduction. The process of meiosis also leads to the production of gametes or sex cells such as sperm and eggs, which will produce a new organism through fertilisation.