Biology A (Salters-Nuffield) A-Level
Zona pellucida
What Zona pellucida means in Biology A (Salters-Nuffield) A-Level, as defined for Pearson Edexcel.
Definition of Zona pellucida
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Reference: Pearson Edexcel
A glycoprotein coat surrounding the egg that sperm must bind to and digest, and which hardens after fertilisation to prevent polyspermy.
Topics that use Zona pellucida
- Topic 3: Voice of the Genome (Pearson Edexcel A-Level)
Related terms
- Acrosome
- Acrosome reaction
- Cell cycle and interphase
- Continuous variation and normal distribution
- Cortical reaction
- Differential gene expression
- DNA methylation
- DNA replication and sister chromatids
Using Zona pellucida in the exam
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