What ensures that only one sperm can fertilize the ovum?

1. Corona Radiata 2. Ground substance around ovum
3. Zona pellucida 4. Acrosome
Subtopic:  Fertilization |
 81%
From NCERT
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What happens when a sperm enters the cytoplasm of the secondary oocyte?

1. Release of first polar body

2. Completion of meiosis II

3. Degeneration of polar bodies

4. Dissolution of zona pellucida

Subtopic:  Fertilization |
 84%
From NCERT
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In humans, the sex of the baby is determined:

1. At the time of fertilization and by the father
2. At the time of fertilization and by the mother
3. At the time of implantation and by the father
4. At the time of implantation and by the mother
Subtopic:  Fertilization |
 91%
From NCERT
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