Question

101. Which of the following options gives the correctsequence of events during mitosis?
(1) codensation → nuclear membrane disassembly→ crossing over → segregation → telophase
(2) condensation → nuclear membrane disassembly→ arrangement at equator → centromeredivision → segregation → telophase
(3) condensation → crossing over → nuclear membrane disassembly → segregation →telophase
(4) condensation → arrangement at equator →centromere division → segregation →telophase

Answer 1

Answer:

I think (4) is the correct one

Answer 2

The option that gives the correct sequence of events during mitosis is:

(2) condensation → nuclear membrane disassembly → arrangement at equator → centromere division → segregation → telophase

• Condensation is the first phase in mitosis and is the reorganization of the long chromatin strands into short chromosomes.

• After this, nuclear membrane disassembly results in dismantling the nuclear pore complexes (NPCs) along with the lamina.

• During this metaphase, chromosomes are arranged at the equator.

• During mitosis, the centromere is responsible for the movement of the replicated chromosomes into 2daughter cells.

• After this segregation of chromosomes takes place in eukaryotes in which two sister chromatids formed due to DNA replication, separate from each other and migrate to opposite poles of the nucleus.

• Telophase is the final phase of mitosis in which the duplicated genetic material carried in the nucleus of a parent cell divides into two identical daughter cells.