Chapter 9

Explain why evolution often selects traits that promote genetic diversity.

Most cells in a sexually reproducing organism have two sets of chromosomes. Explain this observation and describe its significance to meiosis.

What is the difference between haploid and diploid cells? Are your skin cells haploid or diploid? What about gametes?

In some animals, females can reproduce by themselves - that is, without males. In this process, called parthenogenesis, the young develop from unfertilized eggs. Use the Internet to find a species that uses parthenogenesis. How does parthenogenesis work in that species? What are the differences between meiosis in that species and the events of "typical" meiosis?

How are mitosis and meiosis different?

Draw all possible metaphase I chromosomal arrangements for a cell with a diploid number of 8.

List some examples of chromosomal abnormalities, and explain how each relates to an error in meiosis.