Question

Meiosis involves:

• A. A single nuclear division and a single chromosomal division
• B. A single chromosomal division and two nuclear divisions
• C. Two chromosomal divisions and a single nuclear division
• D. Two nuclear divisions and two chromosomal divisions

Answer 1

The correct option is: B

Explanation of the correct option:

Meiosis is a special form of cell division of germ cells in sexually reproducing species used to create gametes, such as sperm or egg cells.

Meiosis is a type of cell division in which the four haploid cells are developed from the diploid parent cell. There are two stages, meiosis I and meiosis II where the nuclear division takes place twice. Chromosomes are split only in anaphase II of meiosis II. In meiosis I, there is a chromosomal division to the opposite pole, without splitting the centromere.

Explanation of the incorrect option:

Option A: In mitosis, there is a single nuclear division and a single chromosomal division.

Option C: Meiosis involves a single chromosomal division and two nuclear divisions. In mitosis, there is a single nuclear division and a single chromosomal division.

Option D: Meiosis involves a single chromosomal division and two nuclear divisions. In mitosis, there is a single nuclear division and a single chromosomal division.

Final answer: Meiosis involves a single chromosomal division and two nuclear divisions.