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How does the entry of the sperm into the egg influence cleavage in terms of body axes?
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- Identify the structures of an egg and a sperm that aredirectly involved in fertilization.Where (specifically) does fertilization take place in the body? When the zygote divides, is it using meiosis or mitosis?What is the role or function of mitosis and meiosis in formation of the sperm and egg cell?
- With regard to early cleavage in the sea urchin, is the entire zygote involved in early cleavage? What happens to the size of cells as the cell number increases? Do they get bigger or smaller in these early stages? How does the size of these cells compare to the size of the original fertilized egg?During Sexual Reproduction what occurs when a sperm cell enters an egg cell?Which duct system persists in female embryos? In male embryos?
- Why should the sperm shrink into an elongated cell with a tail while the egg grows enormously?Describe events that follow contact of a spermatozoon with an egg. What is polyspermy and how is it prevented?At what point in embryonic development does the gonadal ridge no longer exhibit bipotential? 1) week 6 2) week 7 3) week 10 4) week 12 no references, just homework