Place the events of fertilization In the correct order from beginning to end. th

Question

Place the events of fertilization In the correct order from beginning to end. the oocyte pronucleus the center of the the head of the sprmm aliach lo ZP3 the oocyle nucleus the zona pelucida moves outward to form ll penetrates the receptors and acrosomal emzymes back toward Completes meiosis lI,moves plasma membrane a perivitelline s space forming a polar body entering the cytoplasmdiest through the oocyte zona pellucida. one sperm head Eparm attach and move through to the raciata of a secondary oocyte two pronuclei fuse, pentrates the zona pellucida, attaching to cell surface integrins of the oocyte lorming a zygota integrins of ona ra 6

Explanation / Answer

1. Sperm attach and move through to the corona radiata of a secondary oocyte.

2. Sperm attach to Zp3 receptors and acrosomal enzymes digest through the zona pellucida.

3. One sperm head penetrates the zona pellucida attaching to cell surface integrins of the oocyte

4. The zona pellucida move outward to form a perivitelline space

5. The head of the sperm cell penetrates the plasma membrane, entering the cytoplasm

6. The oocyte nucleus completes meiosis II forming a polar body

7. The oocyte pronucleus moves back towards the center of the oocyte

8.Two pronuclei fuse forming a zygote.

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