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Binary Fission & Its Types - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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  • Binary Fission & Its Types is considered one of the most asked concept.

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Binary Fission & Its Types
  • This is the simplest and most common method of asexual reproduction seen in unicellular organisms. 
  • This occurs under the favourable conditions of the environment. 
  • After the organism grown to its full size, the parent divides into two daughter cells which are genetically and morphologically similar. 
  • During this process, the nucleus divides into two, called karyokinesis, followed by the division of the cytoplasm, called cytokinesis.
  • Depending upon the plane of division, binary fission is of following types:
    • Simple Binary Fission
    • Transverse Binary Fission
    • Longitudinal Binary Fission

Simple Binary Fission:

  • This type of binary fission occurs in the irregular-shaped organisms such as Amoeba in which the plane of division is difficult to ascertain.

Transverse Binary Fission:

  • If the plane of division is at a right angle to the long axis of the animal, it is known as transverse binary fission in Paramecium and Planaria.

Longitudinal Binary Fission:

  • In this type, the plane of fission is parallel to the long axis, as in Euglena, Vorticella and in some corals.

Note:

  • In binary fission, the parent body as in whole forms the reproductive unit.
  • After division, it disappears into daughter organisms.
  • Hence, it is said that the parent cell has not died but has continued to live as two daughter individuals now.
  • Thus, organisms performing binary fission are said to be immortal.
     

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