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NEET2013BotanyCell Cycle and Cell DivisionActual

A stage of mitosis is shown in the diagram. Which stage is it and what are its characteristics?

Options

  1. AMetaphase - Spindle fibers attached to kinetochores, centromeres split and chromatids separate.
  2. BMetaphase- Chromosomes moved to spindle equator, chromosomes made up of two sister chromatids.
  3. CAnaphase- Centromeres split and chromatids separate and start moving away.
  4. DLate prophase - Chromosomes move to spindle equator

Correct answer

B. Metaphase- Chromosomes moved to spindle equator, chromosomes made up of two sister chromatids.

Step-by-step solution

Prophase is marked by the initiation of condensation of chromosomal material. The chromosomal material becomes untangled during the process of chromatin condensation. Initiation of the assembly of mitotic spindle, the microtubules, the proteinaceous components of the cell cytoplasm help in the process. Metaphase is characterized by all the chromosomes coming to lie at the equator with one chromatid of each chromosome connected by its kinetochore to spindle fibres from one pole and its sister chromatid connected by

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