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  • Meiotic division during oogenesis is different from that in spermatogenesis. Explain how and why?

Meiotic division during oogenesis is different from that in spermatogenesis. Explain how and why?

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It is true that the meiotic division during oogenesis is different from that in spermatogenesis. Following are the details about significant differences between them:

  • In the case of spermatogenesis, meiotic division begins at the time of puberty. This is the time when spermatogenesis begins in a male. On the other hand, oogenesis begins in the female when the female is still in the womb. Thus, it can be said that meiotic division during oogenesis begins when the girl child is still in the womb.
  • Formation of primary oocytes stops by the 20th week of gestation of the female child. On the contrary, the production of spermatocytes continues throughout the reproductive phase of a male.
  • All the stages of meiosis take place quickly after one another in case of spermatogenesis and there is no time lag between them. In case of oogenesis, meiosis is deferred at the Prophase I state.

Meiosis resumes only once the puberty begins.

Following are some possible reasons for this difference in patterns of oogenesis and spermatogenesis:

  • Male gametes need to be formed in very large number to ensure Fertilisation.
  • Female gametes are not exposed to external hazards, and hence a less number of them would be enough. Limiting the production of female gametes helps in conservation of resources from the female body. The resources can then be properly utilised during the development of the foetus.
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