Meiosis
Lost? go here:
http://www.sumanasinc.com/webcontent/animations/content/meiosis.html
and then here:
http://www.biology.arizona.edu/cell_bio/tutorials/meiosis/page3.html
mitosis review:
http://www.biology.arizona.edu/cell_bio/tutorials/cell_cycle/cells3.html
karyotyping activity:
http://learn.genetics.utah.edu/content/begin/traits/karyotype/
more advanced!
http://www.biology.arizona.edu/human_bio/activities/karyotyping/karyotyping.html