UNIT 8 Honors 11.12 to 11.18

Open Ended

CHECKPOINT QUESTION: How does the cloning of plants from differentiated cells support the view that differentiation is based on the control of gene expression rather than on irreversible changes in the genome?

Poll

CHECKPOINT QUESTION: Why does the history of cloning sheep suggest human cloning should be pursued?

• The life expectancy of the sheep was reduced from normal.

• The sheep was plagued with heath issues not normally seen in young sheep.

• The cloning of sheep demonstrated that many embryos were lost for very few clones produced

• All of the choices were observed.

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Multiple Choice

CHECKPOINT QUESTION: Epithelial cells, those that line body cavities, are frequently replaced and so divide more often than other types of body cells. Will epithelial cells become cancerous when compared to other types of cells?

• Yes, more division more exposure to mutagens.

• No, all cells are equally at risk.

• Yes, epithelial cells are more fragile that other types of cells.

• No, cells in the nervous system divide more frequently therefor they are more at risk.