Question

In which stage of meiosis, homologous chromosome are segregated:-
A. Metaphase I
B. Anaphase I
C. Anaphase II
D. Metaphase II

Answer 1

Meiosis is the division of cells two times and produces four daughter cells which contain the half amount of genetic information. It occurs in the germ cell during the formation of gametes such as sperm in male and egg cells in the female. The Meiosis process consists of several different stages, which name according to the formation or position of chromosomes.

Complete answer:

Option B: The stage in which homologous chromosomes are segregated is assigned as Anaphase I, which is the part of meiosis I, meiosis-I is heterotypic or reduction division and it is studied under four stages name as prophase, metaphase, anaphase and telophase. In anaphase-I, homologous chromosomes separate out, which is called disjunction. The separated chromosomes are named as dyad or univalent due to each of them having two chromatids.

Option A: Metaphase-I:- it is also the stage of meiosis-I, in which bipolar spindle apparatus in the degenerated nucleus region and the chromosomes with short limbs are arranged horizontally on the equatorial region. The slight projection of centromere toward the periphery is present.

Option C: Anaphase-II:- It is the stage that occurs in meiosis-II, meiosis-II is typically shorter than mitotic division due to short prophase of this phase. In this second meiosis the division of chromosomes. In anaphase-II, the centromere divide of each chromosome and two chromatids separate completely, called daughter chromosomes.

Option D: Metaphase-II:- It also occurs in meiosis-II, in this stage, in area of dividing nuclei, fibrous bipolar spindle formed and the chromosomes are reached to the respective spindle fibre and arranged in such a way their lie at the equator.

Hence, the correct answer is option (B).

Note: Cell division is the multiplication process to the formation of a new daughter cell from the preexisting cell, this division occurs in three-ways such as amitosis, mitosis, and meiosis. Mitosis occurs in somatic cells, which is required for growth and maintenance while meiosis is required for gametes formation and occurs in germ cells.