| Cell Division and Mitosis/ Meiosis
Activity #1: Introduction to Cell Division Please read �Silver in the Stream of Time�- page 126-127 1) What is cell division? 2) According to the article, what three questions must be answered in order to understand cell division? 3) What is reproduction? 4) What�s the difference between a �PARENT CELL� and a �DAUGHTER CELL�? 5) What�s so important about the splitting of the cytoplasm? Activity #2: Mitosis vs. Meiosis SOMATIC CELLS GERM CELLS where in the body? ________________ ________________ mitosis or meiosis? ________________ ________________ produces? ________________ ________________ Activity #3: Chromosome and Chromatin Chromosomes are complex structures in the nucleus of cells. They are made of DNA, which is bound to a protein. These bodies accept certain stains and develop a dark color- thus they are called chromosomes. Chromo= color & soma=body The normal functioning of any cell depends on its having the proper pattern of DNA in its chromosomes. The CHROMOSOMES themselves are only visible when a cell is undergoing division. Otherwise they are stretched out as long, thin, thread-like strands called CHROMATIN. When a cell begins to divide, these individual threads coil and begin to take on the appearance of short, thick separate rods. 1) What is the difference between Chromosomes and Chromatin? 2) What is a Chromatid? a. sketch figure 11-4 page 146 in the lab manual b. label the entire drawing �chromosome� c. label the two chromatids and centromere 3) Take a look on page 129 in the textbook, figure 8.3 a through e 4) Onion Root Tip pg. 146 (lab manual). Sketch and label the root cap and the meristem. |