1. What is the state of DNA at the end of meiosis I? What about at the end of meiosis II? 2. Why are chromosomes important? 3. How are meiosis I and meiosis II different? 4. Why do you use non-sister chromatids to demonstrate crossing over? 5. What combination of alleles could result from a crossover between BD and bd chromosomes? 6. How many nuclei are present at the end of meiosis II? How many chromosomes are in each? 7. Identify two ways that meiosis contributes to genetic recombination. 8. Why is it necessary to reduce the number of chromosomes in gametes? 9. Blue whales have 44 chromosomes in every cell. Determine how many chromosomes you would expect to find in the following: a. Sperm Cell b. Egg Cell

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Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase. 

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons: