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Human Reproduction — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction1 Mark
MCQ
The cleavage having incomplete division $($partial cleavage$)$ of egg is known as:
  • A
    Holoblastic
  • ✓
    Meroblastic
  • C
    Meridional
  • D
    Spiral
✓

Answer

Correct option: B.
Meroblastic
Depending on the amount of yolk present in the egg, cleavage can be holoblastic or meroblastic.
Holoblastic is the total or entire cleavage, while meroblastic is the incomplete or partial cleavage.
In the absence of large concentration of yolk, holoblastic cleavage is seen.
In the presence of a large amount of yolk in the fertilized egg cell, the cell undergoes partial or meroblastic cleavage.

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