Cell Division

SC.912.L.16.17 Compare and contrast mitosis and meiosis and relate to the processes of sexual and asexual reproduction and their consequences for genetic variation

Source: http://www.visualphotos.com/photo/1x6011929/cell-division-immunofluorescent-light-micrograph.jpg

What do I need to know? Describe specific events occurring in each of

the stages of the cell cycle and/or phases of mitosis, including cytokinesis.

Describe the process of meiosis, including independent assortment and crossing over.

Differentiate the processes of mitosis and meiosis and describe the role of mitosis in asexual reproduction, and/or the role of meiosis in sexual reproduction, including how these processes may contribute to or limit genetic variation.

Relate the development of cancer (uncontrolled growth) to mutations that affect the proteins that regulate the cell cycle.

Cell Cycle with Mitosis

Organisms grow by creating more cells through division. The cell cycle is the process of a cell growing, preparing for division and dividing. This process occurs in two steps

1) Interphase: Growth and preparation for division

2) Cell Division: Division of the cell

Cell Cycle with Mitosis

Guiding Questions:

What is the difference between haploid and diploid cells.

What occurs during each of the steps of the cell cycle?

Cell Cycle with MeiosisMeiosis is a second type of cell division that reduces the number of chromosomes in a diploid cell by half producing haploid cells.

These haploid cells are used for the process of sexual production Source:http://4.bp.blogspot.com/-jjDKcYUsL9A/UYUsB9c8RII/AAAAAAAAATA/KgsbgtNaYAU/s1600/meiosis-2.jpg

Cell Cycle with Meiosis

Guiding Questions:

What are the steps of meiosis?

How many times does a cell divide during meiosis?

What is occurring during crossing over?

Mitosis vs Meiosis

-2 identical daughter cells.-Diploid cells-1 division-Asexual Reproduction

-4 non-identical daughter cells-Haploid cells-2 division-Sexual Reproduction

-Types of cell division-Follow similar steps (IPMATC)

Cancer

Mutations to the DNA in a cell can lead to the proteins that regulate the cell cycle to lose control.

This results in the uncontrolled cell division and the formation of masses in the body called tumors. Source:http://piniesarjona.wikispaces.com/file/view/

Cancer_Biology.jpg/47976793/Cancer_Biology.jpg

Cancer

Guiding Questions:

1) What is cancer?

2) What is the cause of Cancer?

3) What are the different types of tumors?

4) What are different treatments for cancer?

Show What You Know Mitosis and meiosis are processes

involved in cellular reproduction. Which of the following describes an event that results from mitosis but NOT meiosis?

a. two stages of cell division

b. replication of cellular genetic material

c. daughter cells that are identical to the parent cell

d. four daughter cells that are produced from each parent cell

Show What You Know The diagram below shows homologous chromosomes

during Prophase I of meiosis?

Which of the following correctly describes the process being illustrated?

a. Crossing-over in which alleles are exchanged.

b. Mutation in which the DNA content of the gene is altered.

c. Segregation of sister chromatids.

d. Condensation and segregation of alleles.

Show What You Know Which of the following best describes

meiosis?

a. It happens in all tissues except the brain and spinal cord.

b. It occurs only in cells in the reproductive structures of the organism.

c. It is carried out in all tissues that require cell replacement.

d. It is the first stage of mitosis.

Show What You Know Which of the following phrases best

describes cancer?

a. Presence of genetic defects caused by hereditary disorders.

b. Uncontrolled cell growth caused by mutations in genes that control the cell cycle.

c. Absence of cyclins in the DNA.

d. Multiple gene mutations on a chromosome of DNA.

Show What You Know Which row in the chart below indicates

the correct process for each event indicated?

a. Row 4

b. Row 2

c. Row 3

d. Row 1

Show What You Know Which of the following phases of

mitosis is represented by the diagram below?

a. Anaphase

b. Prophase

c. Metaphase

d. Telophase