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What is terminalisation of chiasmata?...

What is terminalisation of chiasmata?

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Due to tight condensation of chromosomes, the chiasmata disappear from the chromosome by slipping off or sliding from the tip of the chromosome. The movement of chiasmata at the tip of the chromosome due to condensation is called terminalisation of the chiasmata.
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(i) Thin thread like chromosomes with a beaded appearance (ii) Appearance of recombination nodules (iii) Formation of bivalents/tetrads (iv) Terminalisation of chiasmata (v) Appearance of chiasmata Arrange the given statemetns in the correct sequence of their occurrence during prophase I.

(i) Thin thread like chromosomes with a beaded appearance (ii) Appearance of recombination nodules (iii) Formation of bivalents/tetrads (iv) Terminalisation of chiasmata (v) Appearance of chiasmata Identify the different stages with respect to the above given features and select the correct option.

Knowledge Check

  • Which of the following stage is marked by terminalisation of chiasmata ?

    A
    Zygotene
    B
    Pachytene
    C
    Diplotene
    D
    Diakinesis

  • Arrange the following events of meiosis in correct sequence: A. Crossing over B. Synapsis C. Terminalisation of chiasmata D. Disappearance of nucleolus

    A
    (B), (A), (C ), (D)
    B
    (A), (B), (C ), (D)
    C
    (B), (C ), (D), (A)
    D
    (B), (A), (D), (C )

  • Arrange the following events of meiosis in correct sequence (a) Crossing over (b) Synapsis (c) Terminalisation of chiasmata (d) Disappearance of nucleolus.

    A
    b,a,d,c
    B
    b,a,c,d
    C
    a,b,c,d
    D
    b,c,d,a

    • Similar Questions

    Explore conceptually related problems

    which stage of meiotic prophase shows terminalisation of chaismata as its distinctive feature?

    The beginning of which stage of prophase is marked by complete terminalisation of chiasmata and inhibition of RNA synthesis ?

    Arrange the following events of meiosis in correct sequence I. Crossing over. II. Synapsis III. Terminalisation of chiasmata. IV. Disappearance of nucleolus

    Diplotene phase of meiosis is also charactertised by a. Desynapsis b.Complete terminalisation of chiasmata c.Dictyotene stage d. Complete disappearance of nuclear membrane and nucleoli e. Complete development of astral rays and aster f. Longest phase of prophase-I

    Choose the correctly matched pairs and correct option (a) Leptotene - chromosomes become invisible (b) Zygotene - pairing of homologous chromosomes (c) Pachytene - Dissolution of synaptonemal complex takes place (d) Diplotene - Bivalent chromosomes appear as tetrads (e) Diakinesis - Terminalisation of chiasmata takes place

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