BIOLOGY FOR FORM FOUR: MITOSIS AND GROWTH MITOSIS is the process of cell division whereby the chromosome are duplicated and distributed equally to the daughter cell. The process of mitosis takes place in several stages, which are described below. STAGES OF MITOSIS PROPHASE This is the first stage of mitosis. In the early stages thread-like structures appear in the nucleus. These structures are the chromosomes. With time the chromosomes shorten and thicken. Then each of them splits longitudinally into two structure called chromatids. Each of the chromatids is held together at a point called centromere. As the chromosomes become visible, other events take place. The nuclear membrane and the nucleus gradually disappear and a network of fibers appears in the cytoplasm. This network of fibers is referred to as spindle. METAPHASE Prophase is followed by metaphase stages. The nuclear membrane has disappeared completely by the cell and become arranged. The centromere of each p...
Jobs,Scholarships And Education Updates