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Biology

Difference Between Spermatogenesis and Oogenesis

Spermatogenesis vs Oogenesis

Summary: Difference Between Spermatogenesis and Oogenesis is that Spermatogenesis produces mature sperm cells and follows the sequence previously described. While Oogenesis produces a mature ovum or egg.

Difference Between Spermatogenesis and Oogenesis

Spermatogenesis

The result of meiosis in most animals is the formation of sperm and egg cells. Spermatogenesis produces mature sperm cells and follows the sequence previously described. All four products of meiosis often acquire a flagellum for locomotion and a caplike structure that aids in the penetration of the egg.

Oogenesis

Oogenesis produces a mature ovum or egg. It differs from spermatogenesis in that only one of the four meiotic products develops into the functional gamete. The other products of meiosis are called polar bodies and eventually disintegrate. In some animals the mature egg is the product of the first meiotic division and only completes meiosis if it is fertilized.

What is the Difference Between Spermatogenesis and Oogenesis

They differ in three ways:

Meiotic Division

  1. During oogenesis, cytokinesis is unequal because almost all cytoplasm is monopolized by a single daughter cell known as secondary oocyte. This goes to form ovum and the other products of meiosis called polar bodies, degenerate. Whereas, in spermatogenesis all four products of meiosis-I and meiosis-II develop into mature sperms.
  2. The cells from which sperms develop continue to divide by mitosis throughout the male reproductive years. In females at the time of birth ovary already contains all the cells which later on, develop into eggs.
  3. Oogenesis, has long resting periods as compared to spermatogenesis in which mature sperms are produced from precursor cells in an uninterrupted sequence.

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