Figure 12.0 Mitosis

Homologous chromosomes

Figure 12.4 The cell cycle

Figure 12.3 Chromosome duplication and distribution during mitosis

Objective: You will be able to draw the stages of mitotic cell division.

Do Now:• Read through the figure on p. 246-247• Pay attention to what is happening with the

chromosomes.

Figure 12.5 The stages of mitotic cell division in an animal cell: G2 phase; prophase; prometaphase

Figure 12.5 The stages of mitotic cell division in an animal cell: metaphase; anaphase; telophase and cytokinesis.

Figure 12.5x Mitosis

Objective: You will be able to differentiate between cytokinesis in animal and plant cells.

Do Now:• Read, “Cytokinesis”, on p. 248• Differentiate between cytokinesis in plants and

animal cells.

Figure 12.8 Cytokinesis in animal and plant cells

Figure 12.9 Mitosis in a plant cell

Figure 12-09x Mitosis in an onion root

Objective: You will be able to describe the various types of asexual reproduction.

Do Now:• Read “Controls on Cell Division” on p. 250• Why do cuts heal?

Figure 12.13 Mechanical analogy for the cell cycle control system

Objective: You will be able to explain how a cell can become cancerous.

Do Now:• Read “Uncontrolled cell growth” on p. 252• What do all types of cancer have in common.

Proto-oncogene

DNA

Translocation or transposition:gene moved to new locus,under new controls

Gene amplification:multiple copies of the gene

Point mutationwithin a controlelement

Point mutationwithin the gene

OncogeneOncogene

Normal growth-stimulatingprotein in excess

Hyperactive ordegradation-resistant protein

Normal growth-stimulatingprotein in excess

Normal growth-stimulatingprotein in excess

Newpromoter

Objective: You will be able to draw the stages of meiosis.

Do Now:• Read “Chromosome number” on p. 275• Differentiate between a cell that is diploid and on

that is haploid.

Chapter 13: Meiosis

Figure 13.x5 Human male karyotype shown by bright field G-banding of chromosomes

Figure 13.7 The stages of meiotic cell division: Meiosis I

Figure 13.7 The stages of meiotic cell division: Meiosis II

Figure 13.8 A comparison of mitosis and meiosis

Figure 13.8 A comparison of mitosis and meiosis: summary

Figure 13.10 The results of crossing over during meiosis