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Human Reproduction — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction3 Marks
Question
Differentiate between zona pellucida and corona radiata.
✓

Answer

S. No.
Zona pellucida
Corona radiata.
1.
Zona pellucida is a non-cellular secretory glycoprotein layer that surrounds the plasma membrane of mammalian ovum.
Corona radiata is a follicle cell layer that surrounds zona pellucida.
2.
Zona pellucida is a glycoprotein shell which is non-cellular.
Corona radiata is a cellular layer.
3.
Zona pellucida prevents the entry of additional sperms to the ovule.
Corona radiata protects the ovum and also provides proteins to the ovum.

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