Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
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Sources of Genetic Variability in<br />
Sexual <strong>Reproduction</strong><br />
1. Crossing Over: After crossing over <strong>and</strong> synapsis,<br />
sister chromatids are no longer identical.<br />
2. Independent Assortment: Each human can<br />
produce over 8.3 million different gametes by<br />
r<strong>and</strong>om shuffling of chromosomes in meiosis I.<br />
3. Fertilization: A couple can produce over 64<br />
trillion (8.3 million x 8.3 million) different zygotes<br />
during fertilization. This figure does not take into<br />
account diversity created by crossing over.
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