More than two sets of chromosomes 2. Polyploidy will ultimately cause the death of the embryo C. Strategies for preventing polyspermy 1. It consists of the exocytosis of the contents of the cortical granules a. Contain proteolytic enzymes 2. Begins at the point of sperm-egg fusion and propagated around the surface of the egg a. Takes about 1 minute 3.
Cortical reaction makes the vitelline envelope hard a.
Resistant to digestion by sperm proteases 5. A. Prior to fertilization the egg is arrested in metaphase of the second meiotic division B. Division process is reactivated by the penetration of the sperm C. Second meiotic division is completed 1. Maternal from egg D. Development following fertilization 1. Fertilized ovum remains in the fallopian tube for about 72 hours a. Developing zygote migrates through fallopian tube a.