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7 September, 06:33

The events of fertilization must occur in a specific sequence because it is a highly ordered process. Demonstrate your understanding of the proper event order by identifying the correct numerical order for these statements. Put the correct number on the blank in front of each statement.

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  1. 7 September, 06:48
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    Where are the statements?
  2. 7 September, 06:55
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    1. The sperm passes through the corona radiata, the outermost cell layer of the egg.

    2. The sperm breaks through the zona pellucida.

    3. The cell membranes of the egg and sperm fuse together.

    4. The female egg, also called a secondary oocyte at this stage, completes its second meiotic division. This results in a mature ovum.

    5. The sperm's tail and mitochondria degenerate with the formation of the male pronucleus. This is why all mitochondria in humans are of maternal origin.

    6. The male and female pronuclei fuse to form a new nucleus that is a combination of the genetic material from both the sperm and egg.

    7. For Fertilization to occur, Semen must be ejaculated deep within the vaginal cavity, to allow for easier passage of individual sperm.

    8. Semen outside of the body generally has a life expectancy of 30-60 seconds.
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