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