Home
Class 12
BIOLOGY
Read the following statement and choose ...

Read the following statement and choose the correct option
spindle fibres get attached to the kinetochore of the chromosomes during metaphase.
At the end of prophase cells do not show golgi complex, endoplasmic reticulum, nucleolus and the nuclear envelope.
At anaphase centromere splits but chromatids do not separate.

A

A, B & C

B

Only B

C

Only A

D

Only A & B

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each of the statements provided and determine their correctness. ### Step-by-Step Solution: 1. **Evaluate Statement 1**: "Spindle fibres get attached to the kinetochore of the chromosomes during metaphase." - During metaphase, the spindle fibers indeed attach to the kinetochores of the chromosomes. This is a crucial step for proper chromosome alignment and separation during cell division. - **Conclusion**: This statement is **correct**. 2. **Evaluate Statement 2**: "At the end of prophase, cells do not show Golgi complex, endoplasmic reticulum, nucleolus and the nuclear envelope." - During prophase, the cell prepares for division. The Golgi complex and endoplasmic reticulum undergo fragmentation, and the nucleolus and nuclear envelope disassemble. This allows the spindle apparatus to access the chromosomes. - **Conclusion**: This statement is **correct**. 3. **Evaluate Statement 3**: "At anaphase, centromere splits but chromatids do not separate." - In anaphase, the centromeres do split, and the sister chromatids are pulled apart towards opposite poles of the cell. Therefore, the statement that chromatids do not separate is incorrect. - **Conclusion**: This statement is **incorrect**. ### Final Conclusion: - Statements 1 and 2 are correct, while statement 3 is incorrect. Therefore, the correct option is that A and B are correct. ### Answer: The correct option is **D (A and B)**. ---
Promotional Banner

Topper's Solved these Questions

  • Mock test 29 Zoology

    AAKASH INSTITUTE|Exercise EXAMPLE|17 Videos
  • Mock test 31

    AAKASH INSTITUTE|Exercise EXAMPLE|10 Videos

Similar Questions

Explore conceptually related problems

At the end of which phase, when cells viewed under the microscope, do not show Golgi complexes, endoplasmic reticulum, nucleolus and nuclear envelope?

When viewed under the microscope, cells do not show Golgi complexes, ER, nucleolus and nuclear envelope during

Choose the correct statements with respect to the completion of prophase I. Chromosomal material condenses to from compact mitotic chromosomes. Chromosomes are seen to be composed of two chromatids attached together at the centromere. II. Initiation of the assembly of mitotic spindle, the microtubules, the proteinaceous components of the cell cytoplasm III. Cells at the end of prophase, when viewed under the microscope, do not show golgi complexes, endoplasmic reticulum, nucleolus and the nuclear envelope

Read the following statements and select the correct option stating which ones are true (T) and which ones are false (F) in metaphase I spindle fibre attaches to homologus chromosome white in metaphase II attaches to chromatids. Chromosome completely decondenese in telophase I. Blvalent is fromed at leptotene stage level become clearly visible in zygotene stage Diakinesis represents transition to metaphase I.

Which of the following events takes place during anaphase stage of mitosis I. Spindle fibres attach to kinetochores of chromosomes II. Centromeres split and chromatids separate III. Chromatids move to opposite poles IV. Nucleolous, Golgi complex and E.R. reform

Which of the following events are not characteristic features of telophase A. Cchromosome material condensess to form compact mitotic chromosomes B. Nucleolus, Golgi complex and ER reform C. Nuclear envelope assembles around the chromosome clusters D. Centromeres split and chromatids separate E. Chromosomes cluster at opposite, spindle poles and their identify as discrete elemetns is lost.

Answer the following questions regarding the events carried out in the labelled parts of the ab ove given diagram. (1) DNA synthesis occurs in (2) Condenstaion of chromosomal material takes place in (3) Attachement of spindle fibres to kinetochores of chromosomes during (4) Initiation of the assembly of mitotic spindle during (5). Splitting of centromere and separation of chromatids in (6) Movement of chromatids to opposite poles during (7) Reformation of nucleolus, Golgi complex and ER occurs in (8) Alignment of chromosomes along metaphase plate during (9) During of cytoplasm during (10) Preparation of cell division takes place during.

AAKASH INSTITUTE-MOCK TEST 3-EXAMPLE
  1. The phase of mitosis in which chromosomes are thickest and shortest is

    Text Solution

    |

  2. Read the following statement and choose the correct option spindle f...

    Text Solution

    |

  3. Choose the incorrect ones w.r.t. metaphase. Each chromosome with two...

    Text Solution

    |

  4. Which of the following is not a significance of mitosis?

    Text Solution

    |

  5. If karyokinesis is not followed by (i)/, it will lead to formation of ...

    Text Solution

    |

  6. Kinetochores of a chromosome are

    Text Solution

    |

  7. Nuclear envelope assembles around the chromosome clusters at

    Text Solution

    |

  8. How many tetrads are visible in human meiocyte?

    Text Solution

    |

  9. Diakinesis is marked by

    Text Solution

    |

  10. DNA content in a meiocyte at G2 phase is 40 pg. What would be the DNA ...

    Text Solution

    |

  11. Read the following statements and select the correct option stating wh...

    Text Solution

    |

  12. Zygotene is characterized by Pairing of homologous chromosomes App...

    Text Solution

    |

  13. Splitting of centromere of each chomosome which was holding sister chr...

    Text Solution

    |

  14. In oocytes of some vertebrates, diplotene lasts for months or years. I...

    Text Solution

    |

  15. Recombination nodule is seen in stage

    Text Solution

    |

  16. Interkinesis differs from interphase in absence of

    Text Solution

    |

  17. Calculate the total number of meiotic division required to produce 56 ...

    Text Solution

    |

  18. Chiasmata or X-shaped structures become visible during

    Text Solution

    |

  19. A bivalent of prophase I represent

    Text Solution

    |

  20. A short live phase between meiosis II and II is

    Text Solution

    |