Drew's+Mitosis+HW

Chapter 18 Patterns of Chromosome Inheritance. (20 Questions total)

pp.378-379 Chromosomes and the Cell Cycle 1. What is interphase and what are the three stages of interphase. Describe them in detail. The phase that lasts 90% of the cell’s life

2. Define Mitosis and Cytokinesis and Apoptosis. Mitosis-duplication or division of cells Cytokinesis-division of cytoplasm Apoptosis-programmed cell death

3. Insert a picture of the "cell cycle". Label it as :The cell cycle.

4. Insert a picture of a human chromosome "karyotype". Label it as karyotype and define karyotype.

pp. 380 Obtaining Fetal Chromosomes 1. Why would it be important to obtain fetal chromosomes? To view chromosomes for abnormalities

2. Describe the two ways to obtain fetal chromosomes. CHrorionic sampling and amniocentsis

3. Insert a picture of a drawing of aminiocentesis. Label it as amniocentesis.

pp.381-384 Mitosis 1. Describe the structure of a chromosome before duplication and after duplication. Before duplication it has just one chromosome and after it has two and a single centromere

2. What does the cell use to pull the duplicated chromosomes apart? The centrioles

3. Describe the important parts of each phase of mitosis: Prophase, Metaphase, Anaphase, and Telophase. Prophase-when the cell is preparing to divide Metaphase-the nuclear envelope is fragmented Anaphase-the centromeres uniting the sister chromatids divide Telophase-when the chromosomes arrive at the poles

4. How is the cytoplasm divided between the daughter cells following mitosis? In telophase

5. When do human body cells go through mitosis normally? Normally the human body cells go through mitosis early

6. What is a result of mitosis that is not in control? Give an example of what can occur.

7. Insert a picture that includes each of the phases of mitosis in real cell photographs. Make sure the phases are labeled.

Meiosis see p. 389 1. Define gamete, haploid chromosome number, diploid chromosome number. You may need to look these up. 2. Which cells of your body have a diploid number of chromosomes? 3. Which process makes cells with a diploid number of chromosomes? 4. What is the purpose of meiosis? (see page 389) 5. Which cells of your body have a haploid number of chromosomes? 6. Which process uses meiosis: sexual or asexual reproduction? Why? 7. Which takes less time: sexual or asexual reproduction? Why? 8. Why is sexual reproduction more complicated then asexual reproduction? 9. How do the benefits of sexual reproduction