CHROMOSOMES: Made up of DNA and proteins
 number of chromosomes vary with the organism.
 condensed chomatin
 
 CHROMATIN: scattered in the nucleus.
 material that contains DNA and genetic info.

 CHROMATIDS: sister chromosomes hooked together by centromere during   mitosis. Identical rods of chromosomes.

 GENE: segment of DNA that codes specific trait

CELL CYCLE: GROWTH AND DIVISION
INTERPHASE: Prepatory stage for cell division. Three things happen:     1. The cell increases in size (grows)
 2. Organelles duplicate within the cell
 3. Chromotin condense to chromosomes.
 4. Centrioles  are copied in cytoplasm.

MITOSIS: Second stage for cell duplication. The duplication of chromosomes.
 *DNA distributed into two cells by seperation of chromosomes.
 *creation of two nuclei
 
 PHASE 1: PROPHASE   *Centrioles appear with fibers
  *nuclear membrane breaks down
  *chromosomes coil to chromotids with centrioles

 PHASE 2: METAPHASE   * centrioles at opposite ends of the cell
  *fibers connect to centromere of the chromatids
  *chromatids line up in the center (row)

 PHASE 3: ANAPHASE   * centromeres split
  *chromatids go to opposite sides of the cell (2 daughter chromosomes)

 PHASE 4: TELOPHASE  * new nuclear membrane forms around two sets of    chromosomes
  *fibers disappear
 

CYTOKINESIS:  Cell membrane starts to pinch inward to create two seperate cells.   The cytoplasm divides, the organells go to each new cell. This process begins   at the same time as telophase. The final stage of the cell cycle.

 *Animal cells- pinch in at membrane
 *Plant cells-cell plate formed in the middle and grows outwards.
 
 

BINARY FISSION: Prokaryotic cells only have one chromosome. Asexual.