Arrange the following events of meiosis in correct sequence:

  1. Crossing over
  2. Synapsis
  3. Terminalisation of chiasmata
  4. Disappearance of nucleolus
  • Option 1)

    (b),(a),(c),(d)

  • Option 2)

    (a),(b)/(c).,(d)

  • Option 3)

    (b),(c),(d),(a)

  • Option 4)

    (b),(a),(d),(c)

 

Answers (1)

As dicussed in

Zygotene -

The second stage of Prophase I. Chromosomes starts pairing together in a process called synapsis. Each paired chromosome is homologous. Synapsis is accompanied by the formation of the complex structures-synaptonemal complex.

 

- wherein

Zygotene

 

 Synapsis\: (in\: zygotene) \rightarrow Crossing\:over(in\: pachytene)\rightarrowTermination of  chaismata (in darkness)\rightarrowNucleolus dissapears


Option 1)

(b),(a),(c),(d)

This option is correct 

Option 2)

(a),(b)/(c).,(d)

This option is incorrect 

Option 3)

(b),(c),(d),(a)

This option is incorrect 

Option 4)

(b),(a),(d),(c)

This option is incorrect 

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