Q.31 Which of the following statement(s) is/are correct about telophase?
(A) Daughter chromosomes are yet to form
(B) New nuclear envelop starts to reassemble
(C) Division of cytoplasm begins
(D) Nuclear membrane disappears
Telophase is the final stage of mitosis where chromosomes reach the poles and the cell prepares for division. Only option (B) accurately describes events in this phase.
Option Analysis
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(A) Daughter chromosomes are yet to form: Incorrect. Daughter chromosomes form by the end of anaphase when sister chromatids separate; in telophase, they already exist at the poles and begin decondensing.
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(B) New nuclear envelope starts to reassemble: Correct. The nuclear envelope reforms around each chromosome set from endoplasmic reticulum vesicles during telophase.
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(C) Division of cytoplasm begins: Incorrect. Cytoplasmic division (cytokinesis) follows telophase, not occurring within it.
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(D) Nuclear membrane disappears: Incorrect. Nuclear membrane breakdown happens in prophase; it reassembles in telophase.
Telophase marks the conclusion of mitosis, ensuring two identical daughter cells form from the parent cell. This telophase stage of mitosis involves critical reorganization after chromosome separation in anaphase.
Key Events in Telophase
Chromosomes cluster at opposite spindle poles and decondense into chromatin. The mitotic spindle disassembles completely.
Nuclear envelopes reassemble around each chromosome cluster, reforming distinct nuclei. Nucleoli reappear, and transcription resumes.
Telophase vs. Other Stages
| Stage | Chromosome Status | Nuclear Envelope | Cytoplasm Division |
|---|---|---|---|
| Anaphase | Chromatids separate | Absent | Not started |
| Telophase | Decondense at poles | Reassembles | Begins afterward |
| Cytokinesis | Form chromatin | Intact | Occurs |
This table highlights telophase mitosis events, distinguishing it from cytokinesis, vital for CSIR NET exam preparation in cell biology.
