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| C. Fertilization (8-4) |
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| egg and sperm fuse resulting in a zygote (first |
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| embryonic stage) |
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| • | 1. Egg releases |
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| chemotactic molecules |
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| • | 2. Acrosomal process |
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| releases recognition |
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| protein; binds with egg |
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| surface receptors |
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| • | 3. Cortical granules |
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| released |
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| • | 4. Fertilization |
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| membrane lifts, |
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| preventing polyspermy |
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