Q.5 Distinguish between human sperm and ovum.
Best answer
Answer:
| Human sperm | Human ovum |
|---|---|
| Male gamete, produced in the testis by spermatogenesis. | Female gamete, produced in the ovary by oogenesis. |
| Very small (about 60 µm long). | Large (about 0.1 mm or 100 µm in diameter). |
| Elongated, with head, neck, middle piece and tail. | Spherical, without such parts. |
| Motile (swims with its tail). | Non-motile. |
| Has very little cytoplasm; contains an acrosome and mitochondrial spiral. | Has abundant cytoplasm (ooplasm); surrounded by zona pellucida and corona radiata. |
| May carry an X or a Y chromosome (23, X or 23, Y). | Always carries an X chromosome (23, X). |
| Millions are produced continuously after puberty. | Usually one is released per menstrual cycle. |
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