Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2026BiologyChapterActual

Arrange the following key cellular events of Prophase I of meiosis in their correct sequential order: (A) Disappearance of the nucleolus and breakdown of the nuclear envelope (B) Appearance of recombination nodules (C) Compaction of chromosomes continues (D) Formation of the synaptonemal complex (E) X-shaped structures called chiasmata become visible Choose the correct answer from the options given below:

Options

  1. A(C), (B), (D), (E), (A)
  2. B(C), (D), (B), (E), (A)
  3. C(D), (C), (B), (A), (E)
  4. D(C), (D), (E), (B), (A)

Correct answer

B. (C), (D), (B), (E), (A)

Step-by-step solution

Prophase I of meiosis is divided into five stages based on chromosomal behavior: Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis. Leptotene: The compaction of chromosomes continues throughout this stage, making them gradually visible under a light microscope. This corresponds to event (C). Zygotene: Homologous chromosomes start pairing together (synapsis), which is accompanied by the formation of the synaptonemal complex. This corresponds to event (D). Pachytene: This stage is characterized by the appeara

Practice Chapter on Quantrex Academy →

More from Chapter

Consider the following three biomolecules: X: Uridine Y: Cytidylic acid Z: Guanine Choose the option that correctly categorizes X, Y, and Z. 2026The complete, catalytically active enzyme together with its bound non-protein constituent is known as: 2026During a laboratory experiment, a student accidentally boils a sample of salivary amylase before adding it to a starch solution. Which of the following best explains the most likel 2026During a biological survey, a researcher discovers a new organism. To classify it properly, she examines its external and internal structure, cellular organization, developmental p 2026Given below are the stages in the sexual reproduction of higher fungi. Arrange the following stages in the correct sequence. A. Fusion of parental nuclei (Karyogamy) B. Meiosis in 2026Read the given statements regarding the general characteristics of bryophytes and select the incorrect statement. 2026Arrange the following male reproductive structures of gymnosperms in descending order of their physical hierarchy (macroscopic to microscopic). A. Microsporangium B. Microspore C. 2026Which of the following sets of plants is correctly paired with the nature of its dominant plant body and the status of its vascular tissues? 2026 Full Chapter list All NEET PYQs