Which connective tissue specializes in storage of fat? a. tendon b. adipose tissue c. reticular tissue d. dense connective tissue
Tuesday, March 24, 2015 The Cell Cycle Mitosis Stages of Cell Cycle= M, G1, S, and G2 When do cells divide -during development -during growth -cell repair and replacement *brain and spinal chord cells cannot divide when adult stem cells= undifferentiated cells G1= cells have just divided from a previous cell -cell growth -replication of organelles -cell is doing its job (mostly making proteins) Karyotype- 46 chromosomes (23 pairs) -only appears organized during M stage -DNA exists as chromatin during stages G1, S, and G2 chromatin= uncondensed DNA with associated proteins interphase= stages G1, S, and G2 1 Tuesday, March 24, 2015 S= DNA replication -copy all 46 chromosomes G2= cell is still doing cell job -organelle replication -cell growth -centrosome replication (1—> 2) Interphase= G1, S, and G2 Prophase Metaphase M (Mitosis or Meiosis) Anaphase Telophase Prophase: -chromosomes become condense and visible -nuclear envelope breaks down -microtubules grow from centrosomes and attach to chromosomes Metaphase: -all chromosomes are aligned at “equator” of cell (metaphase plate) Anaphase: -sister chromatids separate and migrate to opposite poles * sister chromatids are genetically identical 2 Tuesday, March 24, 2015 Telophase: -division of cytoplasm -2 new cells and nuclear envelopes reform Meiosis division of cells to form gametes (eggs and sperm)
