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Human Reproduction — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction1 Mark
MCQ
Types of cleavage in centrolecithal eggs is:
  • A
    Spiral
  • ✓
    Superficial
  • C
    Discoidal
  • D
    Unequal holoblastic
✓

Answer

Correct option: B.
Superficial
Centrolecithal eggs describe the placement of the yolk in the centre of the cytoplasm of the ovum.
The cytokinesis of centrolecithal zygotes undergoes meroblastic cleavage.
It is a type of cleavage where the cleavage plane extends only to the accumulated yolk and is superficial.

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