Question
Write two differences between spermatogenesis and oogenesis.
| S. No. | Spermatogenesis | Oogenesis |
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(i)
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It is the process of formation of haploid spermatozoa from diploid male germ cells of the testes.
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It is the process of formation of haploid ova from the gamete mother cells (oogonia) in the ovary.
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(ii)
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It occurs in testes.
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It occurs in ovaries.
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(iii)
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A primary spermatocyte divides to form two secondary spermatocytes by meiosis I.
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A primary oocyte divides by meiosis I to form one secondary oocyte and a polar body.
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(iv)
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Spermatogonia changes to primary spermatocyte.
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Oogonia changes to primary oocyte.
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(v)
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A secondary spermatocyte divides to form two spermatids by meiosis II.
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A secondary oocyte divides by meiosis II to form ovum and a polar body.
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(vi)
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No polar body is formed.
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Polar bodies are formed.
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(vii)
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Four spermatozoa are produced from one primary spermatocyte.
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One ovum/ egg is produced from one primary oocyte.
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