Medicneet Logo
NEET 2022 · BiologyMeiosis IPrevious Year Question

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

Answer: (C) Sites at which crossing over occurs. Answer: Sites at which crossing over occurs Solution: Recombination nodules appear during pachytene and mark the sites where crossing over takes place between non-sister chromatids of homologous chromosomes.

  1. A.Synaptonemal complex
  2. B.Bivalent
  3. C.Sites at which crossing over occurs✓
  4. D.Terminalization

Correct Answer

(C) Sites at which crossing over occurs

Solution & Explanation

Answer: Sites at which crossing over occurs Solution: Recombination nodules appear during pachytene and mark the sites where crossing over takes place between non-sister chromatids of homologous chromosomes. The synaptonemal complex (zygotene) is the structure formed during synapsis, a bivalent/tetrad is the paired pair of homologues itself, and terminalisation refers to the movement of chiasmata to chromosome ends in diakinesis. NCERT Reference: Ch 10, p.126, lines 58-59 — "appearance of recombination nodules"

🎯
43,000+ questions in हिंदी & English · one-tap toggle
Practice NEET 2022 Biology — free, with instant solutions
43,000+ NEET questions solved step-by-step, chapter-wise, in the MedicNEET app.
📚Practice all NEET Biology PYQs chapter-wise →💡Don't get it? Learn the Cell Cycle and Cell Division concepts →
← Biology Q18Biology Q20 →

More NEET PYQ solutions

BiolGiven below are two statements. Statement 1: Chromosomes become gradually visible under light microscope during leptotene stage. Statement 2: The beginning of diplotene stage is recognized by dissolution of synaptonemal complex. In the light of the above statements, choose the correct answer from the options given below.BiolMatch List-I with List-II: List-I (Sub Phases of Prophase I) A. Diakinesis B. Pachytene C. Zygotene D. Leptotene List-II (Specific characters) I. Synaptonemal complex formation II. Completion of terminalisation of chiasmata III. Chromosomes look like thin threads IV. Appearance of recombination nodules Choose the correct answer from the options given below:BiolThe dissolution of synaptonemal complex occurs duringBiolDissolution of the synaptonemal complex occurs during:BiolSelect correct sequence of substages of Prophase-I of meiotic division: (A) Zygotene (B) Pachytene (C) Diakinesis (D) Leptotene (E) DiploteneBiolSelect the correct statements. A. Tetrad formation is seen during Leptotene. B. During Anaphase, the centromeres split and chromatids separate. C. Terminalization takes place during Pachytene. D. Nucleolus, Golgi complex and ER are reformed during Telophase. E. Crossing over takes place between sister chromatids of homologous chromosome. Choose the correct answer from the options given below:BiolThe process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?BiolWhich stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?
More: All NEET 2022 Biology PYQs · NEET Biology PYQs · All NEET PYQs · Previous year papers