Home
Class 11
BIOLOGY
Plant X has 2n=8 chromosomes.sketch the ...

Plant X has `2_n`=8 chromosomes.sketch the various stages of meiosis in This plant.

Text Solution

AI Generated Solution

The correct Answer is:
To sketch the various stages of meiosis in Plant X, which has `2n = 8` chromosomes, we will go through the stages of meiosis step by step. ### Step-by-Step Solution: 1. **Prophase I**: - In this stage, the chromosomes condense and become visible. Each chromosome pairs with its homologous chromosome, forming tetrads (four chromatids). Since `2n = 8`, there will be 4 pairs of homologous chromosomes. - **Sketch**: Draw 4 pairs of homologous chromosomes, each consisting of two sister chromatids. 2. **Metaphase I**: - The tetrads align at the equatorial plate of the cell. Spindle fibers attach to the kinetochores of the homologous chromosomes. - **Sketch**: Illustrate the paired chromosomes lined up along the equatorial plate with spindle fibers extending from the poles to the kinetochores. 3. **Anaphase I**: - The homologous chromosomes are pulled apart to opposite poles of the cell. Each chromosome still consists of two sister chromatids. - **Sketch**: Show the homologous chromosomes moving towards opposite poles, with the spindle fibers pulling them apart. 4. **Telophase I and Cytokinesis**: - The chromosomes reach the poles and begin to de-condense. The nuclear envelope may reform around each set of chromosomes, and the cell divides into two daughter cells through cytokinesis. - **Sketch**: Draw two cells, each with 4 chromosomes (still in sister chromatid form). 5. **Prophase II**: - In each of the two daughter cells, the chromosomes condense again, and the spindle apparatus forms. The nuclear envelope disintegrates if it had reformed. - **Sketch**: Illustrate the two daughter cells with condensed chromosomes and spindle fibers forming. 6. **Metaphase II**: - The chromosomes align at the equatorial plate again, and spindle fibers attach to the kinetochores of the sister chromatids. - **Sketch**: Show the chromosomes lined up at the equatorial plate in both cells. 7. **Anaphase II**: - The sister chromatids are pulled apart to opposite poles of the cells. - **Sketch**: Illustrate the sister chromatids moving toward opposite poles. 8. **Telophase II and Cytokinesis**: - The chromatids reach the poles, and the nuclear envelope reforms around each set of chromosomes. Cytokinesis occurs, resulting in four haploid daughter cells. - **Sketch**: Draw four cells, each with 4 chromosomes (now individual chromatids). ### Final Sketch: - You should have a series of sketches showing each stage of meiosis, from Prophase I to Telophase II, illustrating the reduction from diploid to haploid.
Promotional Banner

Topper's Solved these Questions

  • CELL CYCLE AND CELL DIVISION

    PRADEEP|Exercise ANALYTICAL QUESTIONS WITH ANSWERS|20 Videos
  • CELL CYCLE AND CELL DIVISION

    PRADEEP|Exercise PRACTICE QUESTIONS(Multiple choice quetions)|72 Videos
  • CELL CYCLE AND CELL DIVISION

    PRADEEP|Exercise SHORT ANSWER QUESTIONS|27 Videos
  • CELL : THE UNIT OF LIFE

    PRADEEP|Exercise PRACTICE QUESTIONS(ASSERTION-REASON)|33 Videos
  • CHEMICAL COORDINATION AND INTEGRATION

    PRADEEP|Exercise Model Test Paper|26 Videos

Similar Questions

Explore conceptually related problems

The site of meiosis in higher plants-

Chromosomes replicate in which stage of meiosis?

A plant root has 16 chromosomes , so

A plant cell has 12 chromosomes at the end of mitosis. How many chromosomes would it have in the G_(2) phase of its next cell cycle

The number of chromosome groups at the equatorial plate in metaphase-I of meiosis in a plant with 2n=50 shall be

Plant A has 2n =12 chromosomes while plant B has 2n = 16 chromosomes . An allotetaploid is raised from them . What is its chromosome number

The endosperm cells in an angiospermic plant has 18 chromosomes, the number of chromosomes in its root cells will be ……….. .

PRADEEP-CELL CYCLE AND CELL DIVISION -LONG ANSWER QUESTIONS
  1. Explain the mitotic cell division with the help of a series of labelle...

    Text Solution

    |

  2. Draw a labelled sketch showing various stages of meiosis.

    Text Solution

    |

  3. Draw a figure of cell cycle.

    Text Solution

    |

  4. List the main differences between mitosis and meiosis.

    Text Solution

    |

  5. Plant X has 2n=8 chromosomes.sketch the various stages of meiosis in T...

    Text Solution

    |

  6. What are homologous chromosomes? What Happens to homologous during mei...

    Text Solution

    |

  7. Anaphase-I of meiosis differs from anaphase of mitosis in one essentia...

    Text Solution

    |

  8. Why does a Multicellular organism require two type of cell division?W...

    Text Solution

    |

  9. A well-known biologist stated that the life history of an organism can...

    Text Solution

    |

  10. Discuss the forces that move the chromatids apart of mitotic anaphase.

    Text Solution

    |

  11. Tabulate diffrences between plant and animal cells regarding cytokines...

    Text Solution

    |

  12. Why is meiosis called the reductional division,Whereas mitosis is call...

    Text Solution

    |

  13. How cytokinesis is different in an animal and plant cell?

    Text Solution

    |

  14. What are chiasmata? State their significance.

    Text Solution

    |

  15. Why is meiosis essential in sexually reproducing oraganisms?

    Text Solution

    |

  16. Draw diagrams to show the sequence of changes occuring in a cell durin...

    Text Solution

    |

  17. Fill in the blanks with suitable word: (i)Gave the aphorism ''omnis c...

    Text Solution

    |

  18. Comment on the statement-telophase is reverse of prophase.

    Text Solution

    |

  19. What are the various stages of meiosis prophase-I?Enumerate the chromo...

    Text Solution

    |

  20. List the main differences between mitosis and meiosis.

    Text Solution

    |