Modes of Reproduction: Asexual and Sexual · NCERT Biology

When the two gametes are so similar in appearance that it is not possible to distinguish them into male and female, they are called:

  1. Heterogametes
  2. Isogametes
  3. Anisogametes
  4. Oogametes (egg gametes)
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Correct answer: Isogametes

Isogametes (or homogametes) are morphologically identical. This condition is found in some algae like Cladophora, where male and female gametes look exactly the same.

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