COMD 2050 Chapter : CH1920
Document Summary
Cell cycle: life of a cell from the time it is first formed fro a dividing parent cell until own division into two daughter cells. Karyokinesis: division of nucleus: cyto- and kary- do not have to occur together. G1 (gap 1) & g2 (gap 2): growth. G1, s, and g2 are all parts of interphase: dna in interphase is relaxed and extended while during mitotic phase chromosomes are condensed and super coiled. <= in this picture there is 8 molecules of dna but 4 replicated chromosomes: mitotic spindles attach to kinetochores on chromosomes. In plants: cell plate forms in cell making two cells. In animals: cleavage forms due to actin rings and pinches and splits cell into two. Heredity: transmission of traits from one generation to the next. Homologs: two chromosomes with same genes but different variations of that gene. Diploid: two sets of chromosomes; 2n; human= 46. Haploid: one set of chromosomes; n; human= 23.
