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4.1. THEORETICAL QUESTIONS necessary for ACHIEVING of the practical classes:
1. Kinds of division of cells. Definitions.
2. Stages cell cycle. Description.
3. Periods of an interphase. Description.
4. Phase of mitosis. Description.
5. Value (significance) of mitosis.
6. Phase of meiosis. Description.
7. Value (significance) of meiosis.
INDEPENDENT WORK of the STUDENTS
1. To sketch the schema of stages cell cycle (Figure22.1).
2. To sketch the schemas of
- 4 phases of mitosis (Figure 22.2).
- Crossing over between homologous chromosomes (recombination) (Figure 22. 12)
3. To consider under a microscope at small and large magnification and to sketch:
а) Microslide of cells meristem of a root an onion. To note in figure phases of a mitosis;
b) Microslide - amitosis of a cell in epithelia of urinary bladder of a Frog.
CARRYING OUT of the closing TEST CONTROL
1. At what kind of division of cells there is an irregular allocation of the inheritable information:
а) mitosis, b) meiosis, c) amitosis, d) endomitosis, e) phagocytosis?
2. How many basic stages are there in a mitotic cycle:
а) 2, b) 3, c) 5, d) 4, e) 6?
3. What basic material is synthesized in the S-periods of an interphase:
а) lipase, b) peptides, c) carbohydrates, d) chromosomes, e) DNA?
4. To list the basic structural components of a cell center:
а) spindle of division, b) centrodesmose, c) centriole, d) centrosphere, e) nucleolus?
5. Where are chromosomes situated during metaphase:
а) in a nucleus b) on poles of a cell, c) on equator of a cell?
6. Where are chromosomes situated during anaphase:
а) in a nucleus, b) on equator, c) in a microcentrum, d) on poles of a cell?
7. In what phase does spindle of division disappear:
а) metaphase, b) prophase, c) anaphase, d) telophase?
8. What is cytokinesis:
а) division of a nucleus, b) division of chromosomes, c) one of 2 phases of a mitosis, d) division of cytoplasm, e) the period of an interphase?
9. What is the mean of division at somatic cells:
a) amitosis, b) mitosis, c) meiosis, d) schizogony, e) budding?
Problem 1. 100 cells of tissue have passed mitosis. But only 80 of these cells enter into S-phase of mitotic cycle. Where are the rest cells?
Problem 2. The mechanism of the second metaphase of meiosis is the similar to metaphase of mitosis, but there is difference. What difference?
5. SUMMARIZING the study by the teacher and valuation of performance of works by each student.
6. PLACE and TIME of the study: an educational room, 2 academic hours.
7. EQUIPMENT of the study: microscopes, microslides, tables, schemes.
8. Literary Sources:
1. Medical Biology: Textbook. - Simferopol: IAD CSMU, 2002. – P. 44 – 52, 62 – 69.
STUDY 23
Theme: cell biology. Control work.
1. The MEANING of the THEME. The study of constitution of cell and processes of cell division allows more deeply to understand the causes of originating of pathologic process, promotes introduction in practice of new methods of diagnostics and treatment.
2. PURPOSE of STUDY. General: To receive representation about a cell and processes of cell division to understand specifics organization of cells.
3. THE CONCRETE PURPOSES of STUDY:
3.1. To know constitution of cell
3.2. To know processes of cell division
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