Chromosomes are copies (# doubles)
Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy (sister chromosome) change to sister chromatids at end of this phase.
This is where DNA is replicated and its centrioles divide and new organelles are made.
Chromosomes are not visible during interphase!
Mitosis begins (cell begins to divide)
Centrioles (or poles) appear and begin to move to opposite ends of cell
Spindle fibers form between the centrioles and attach to the centromeres. The nuclear membrane breaks apart. Chromosomes condense into rodlike structures.
Chromatids (or pairs of chromosomes) attach to the spindle fibers
The chromatids are lined up at the equator
Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell by the spindle fibers.
Two new nuclei form
Chromosomes appear as chromatin (threads rather than rods)
The spindle disappears
Cell membrane moves inward to create two daughter cells - each with its own nucleus with identical chromosomes
The cell cycle is complete
How does the number of chromosomes in a daughter cell compare to the number of chromosomes in a parent cell?
The daughter cell has the exact same number of chromosomes.
How is mitosis in plant cells different from mitosis in animal cells?
Plant cells have rigid cell walls and no centrioles
During cytokinesis the _________ divides, distributing the organelles into each of the two new cells.
Why does a cell make a copy of its DNA before mitosis occurs?
DNA replication ensures that each daughter cell will have the genetic information it needs to carry out its activities
The regular sequence of growth and division that cells undergo is called the _______ __________
List three things that the cell is doing during interphase
copy of its DNA
prepares to divide into two cells