Chapter 20

Distinguish among totipotent, pluripotent, and multi potent stem cells, and grue an example of where you would find each type of cell.

Explain the role of homeotic genes in Drosophila development, and describe one phenotype in Drosophila resulting from a mutation in a homeotic gene that leads to development of a body part in an inappropriate segment.

Explain why some genes, particularity those involved in the early stages of development, are evolutionary conserved.