Describe the purpose of cell cycle checkpoints.

Chromosomes are duplicated during what portion of the cell cycle? a. G 1 phase b. S phase c. prophase d. prometaphase

Why is cell furrowing important in cell division? If cytokinesis did not occur, what would be the end result?

Describe the general conditions that must be met at each of the three main cell-cycle checkpoints.

Identify the stages of mitosis, and describe the important events that occur during each stage.

Separation of the sister chromatids is a characteristic of which stage of mitosis? a. prometaphase b. metaphase c. anaphase d. telophase

Cell differentiation occurs through _______________, whereas morphogenesis involves _______________. (a) pattern formation; cell determination (b) cell division; cell expansion (c) cell expansion; pattern formation (d) cell determination; cell division (e) cell determination; pattern formation

How can errors in the cell cycle lead to cancer in humans?

Explain the difference between a proto-oncogene and a tumor suppressor gene.

S. Chromosomes are duplicated during what stage of the cell cycle? G1 phase S phase prophase prometaphase