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  • A microspore mother cell forms _______ through ________Option: 1 pollen grain; mitosisOption: 2</strong

A microspore mother cell forms _______ through ________

Option: 1

pollen grain; mitosis


Option: 2

microspores; mitosis


Option: 3

miscrospores; meiosis


Option: 4

none of these


Answers (1)

As we have learnt:

Microsporogenesis:

  • The formation of microspores or pollen grains inside the microsporangium is known as microsporogenesis. 
  • When the anther is young, a layer of homogenous cells occupies the centre of each microsporangium, is known as sporogenous tissue. 
  • It is diploid in nature. 
  • The sporogenous tissue transforms into microspore or pollen mother cells.
  • These microspore mother cells undergo meiotic divisions to form microspore tetrads (four microspores) which are haploid. 
  • These microspores mature to form pollen grains, male gametes. 
  • One microspore mother cell forms four microspores.
  • The microspores develop to form the pollen grains.
  • In some cases, all the four pollens remain attached to form compound pollen grain, as seen in Typha.
  • In Calotropis, all the pollen grains of an anther lobe remain united in a single sac called pollinium.
  • Each microsporangium contains thousands of microspores or pollen grains.

-Microspore mother cells is diploid and on sporic meiosis produces a tetrad of four haploid microspores.

Hence, the correct answer is option c.

Posted by

Kshitij

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