BIOL 1201 Chapter : Chapter 3 Lecture Newcomer
Document Summary
When cells divide, they must have on copy of the 46. How to insure that each daughter cells get the complete set of chromosomes: need a mechanism to allow each daughter cell to have a copy of each daughter cell to have a copy of each chromosome. Mitosis: cell division: reproduction of cells, growth, repair, purpose: produce daughter cells that have identical genetic complements, occur in somatic cells, all body cells except cells that give rise to gametes, only one cell division. Chromosomes: a complex linear strand of dna and protein, each eukaryotic species has a characteristic number, found in nucleus. Chromatin: long linear strand of dna and complexed proteins. Duplicated chromosomes (figure 12. 5: consists of two sister chromatids. Identical copies of dna: attached at a specialized region called the centromere, where chromatids are physically held together. Interphase: gap 1 (g1, synthesis of cell components.
