Question

The number of chromatids, in a chromosome at anaphase.
A. 2 in mitosis and 1 in meiosis
B. 1 in mitosis and 2 in meiosis
C. 2 each in mitosis and meiosis
D. 2 in mitosis and 4 in meiosis

Answer 1

Hint: Anaphase is the fourth phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.

Complete Answer:
- At the start of the Anaphase, the replicated chromosomes, called sister chromatids, are adjusted along the equator of the cell on the central plane. The sister chromatids are sets of indistinguishable duplicates of DNA joined at a point called the centromere.
- During anaphase, each pair of chromosomes is isolated into two indistinguishable, autonomous chromosomes. The chromosomes are isolated by a structure called the mitotic axle. The sister chromatids are isolated all the while at their centromeres. The isolated chromosomes are then pulled by the axle to inverse posts of the cell.
- Meiosis happens in two phases meiosis I and meiosis II. During meiosis I, homologous chromosomes independent and the quantity of chromosomes in daughter cells get reduced to half. This division is known as reductional division.
- Equational division is the main cell division in meiosis, the cycle by which germ cells are framed. In decreasing division, the chromosome number is diminished from diploid (46 chromosomes) to haploid (23 chromosomes), called first meiotic division and first meiosis.
- During meiosis II, centromere parts and the chromosome number continues as before in the daughter cells. Thus, meiosis II is known as equational division. It doesn't lessen chromosome numbers. An atomic division that keeps up a similar ploidy level of the cell.
Thus, the quantity of chromatids in a chromosome at anaphase is 1 in mitosis and 2 in meiosis.

Hence, the correct answer for this question is B, i.e. 1in mitosis and 2 in meiosis.

Note: Meiosis is a key event of the sexual cycle in eukaryotes. It is the phase of the existence cycle when a cell offers ascend to two haploid cells (gametes) each having half the same number of chromosomes. Two such haploid gametes, emerging from various individual living beings, combine by the cycle of treatment, in this manner finishing the sexual cycle.