Anaphase II differs from mitotic anaphase in:-
1.Separation of chromatids
2.Its occurrence in haploid cells only
3.Involvement of splitting of centromere
4.Both (2) & (3)
Answers
Answer:
Main Difference
There are two major steps in cell division. One is nuclear division and other is cytoplasmic division. Mitosis and meiosis are the two types of nuclear division. Following these processes, Anaphase is the stage in the process of cell division (mitosis or meiosis) in which daughter chromosomes move away from each other to the opposite sides of the cell. It is further classified into two as, anaphase 1 and anaphase 2. Anaphase 1 is that phase in which homologous chromosomes separate to each side of the cell, and the centromere is intact while in anaphase 2, the sister chromatids separate and the centromere splits into two which result in two separate chromatids. Another main difference in anaphase 1 and anaphase 2 is that anaphase 1 takes place in diploid cells while anaphase 2 takes place in haploid cells.
Explanation:
Comparison Chart
Basis of Distinction Anaphase 1 Anaphase 2
Occurrence Anaphase 1 occurs in the diploid cells while meiosis 1. Anaphase 2 occurs in the haploid cells while meiosis 2.
Definition Anaphase 1 is the phase in meiosis 1 (nuclear division) in which two different chromosome separates from each other and move to the opposite poles. Anaphase 2 is the phase in meiosis 2 (nuclear division) in which two sister chromatids separate and move towards the opposite poles.
Centromere Functionality In Anaphase 1, a single centromere remains intact, as homologous single chromosomes separate. In Anaphase 2, two centromeres split and separates as two sister chromatids move to each end of the poles.
Main Functionality It is one of the most important stages in cell division, in which chromosomes separates and move to opposite poles for the division. It is also one of the most important stages in meiosis 2 cell division, in which two sister chromatids attached to their centromeres separates and move to opposite poles for the division.
Takes place Anaphase 1 takes place in the diploid cells in meiosis 1. Anaphase 2 takes place in haploid cells in meiosis 2.
Spindle Fibers Two spindle fibers are attached to the centromeres of two different chromosomes individually. Two spindle fibers are attached to the single centromere of the two sister chromatids.
Chromosomes Separation Two homologous chromosomes are separated. Two sister chromatids are separated.
Mitosis Similarity Does not have any similarity with the anaphase of mitosis. Anaphase 2, on the other hand, is quite similar to the anaphase of mitosis.
Presence of Chromosomes Homologous. chromosomes are present on the opposite end of the poles. Sister chromatids are present at the opposite end of the poles.
Answer:
both (2) & (3) .........