BIOL 2153 Study Guide - Midterm Guide: Meiosis, Kinetochore, Heredity
Document Summary
Cell division: mitosis produces two identical daughter cells that are exact replicas of the, most body cells are somatic cells (non reproductive), usually with chromosomes parental cell. present in pairs, the number of chromosomes is the diploid number (2n, the haploid chromosome number includes one of each chromosome pair (n, triploid (3n) cells have 3 copies of each chromosome, trisomic (2n +1) cells have one extra chromosome. Interphase: during the gap 1 (g1) phase of interphase, all proteins needed for normal cell function are transcribed and translated; the duration of g1 varies, dna is copied during s phase or synthesis phase, a small number of cells enter g0 after g1; cells in g0 never progress through the cell cycle, during s phase, doubling of the dna takes place, two sister chromatids are produced for each chromosome, the completion of s phase leads into g2 or gap 2 phase, during which the cells prepare for division.
