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Please explain transverse binary fission and also explain the following diagram specifying which is meganucles and which one us micronucleus.

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Please find below the solution to the asked query 
 

Transverse binary fission is the separation of cytoplasm between two pair of nuclei resulting in formation of two unrelated individuals. Ex: Paramecium.​

  • The meganucleus is larger nucleus that controls the metabolic activity of cell. It divides directly by amitosis. 
  • The micronucleus is the smaller nucleus that controls the reproductive activities of cell. It divides by mitosis.
During binary fission, the paramecium divides transversely i.e along the transverse axis of the body. During this division, the meganucleus divides by amitosis and the micronucleus divides by mitosis. Then the cytoplasm divides and two daughter cells one towards proter (anterior) side and another towards opisthe (posterior) side. These two cells are dissimilar and lack some of the components each. They grow and develop these deficient components and become similar. This can be depicted b the following diagram.

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