BIOL 2100 Lecture Notes - Lecture 24: Separase, Growth Factor, Cell Division
Document Summary
G1 phase stage where cell just functions normally. G0 normal life, not susceptible to go into s phase, nondividing stage, where cells stay for long periods of time. Prometaphase membrane breaks down, spindles penetrate , chromosomes form line in the middle. Metaphase chromatids attached to spindles, one from each side. Anaphase pairs of chromatids split, spindles elongates. Prometaphase connection of spindle fibers to chromatids and breakdown of nuclear membrane. All phases of cycle have replicated chromosomes, because chromosomes are replicated during s phase. Metaphase homolog chromosomes (same size) pair up homologous chromosomes do not pair up. To be replicated, function, for genes to be expressed, for the material to be accessible. Cell fusion experiments can be caused by chemical compounds, viruses (in lab) Indicates that there"s something inside the cell the controls which stage the cell is in. Mpf maturation promoting factor (mitosis promoting factor)