Lab Cell Cycle

Virtual Lab: The Cell Cycle and Cancer

Worksheet

1. In which phase of mitosis do each of the following occur:

a. Centromeres split and chromosomes move toward opposite sides of the cell

b. Chromatin coils to form visible chromosomes

c. The nuclear membrane disappears

d. Sister chromatids line up in the center of the cell

All these characteristics are common to one and only one phase in the mitosis, which is the prophase.

2. In which phases of mitosis are sister chromatids visible, and attached to each other at the centromere?

This occurs in the metaphase.

Table 1: Record your data for the number of cells in each stage of the cell cycle observed in normal tissues.

|Tissue Type |# Cells in |# Cells in Prophase |# Cells in |# Cells in Anaphase|# Cells in |

| |Interphase | |Metaphase | |Telophase |

|Lung Tissue |4 |1 |0 |0 |0 |

|Sample 1 | | | | | |

|Lung Tissue |4 |0 |0 |1 |0 |

|Sample 2 | | | | | |

|Stomach Tissue |3 |0 |1 |0 |1 |

|Sample 1 | | | | | |

|Stomach Tissue |1 |1 |1 |0 |2 |

|Sample 2 |...