Chromatin
DNA floating around the nucleus.
Chromosome
Organized DNA.
Chromatid
Chromosomes that are exact copies of one another.
Centromere
the region of the chromosome that holds the two sister chromatids together during mitosis
Cell Cycle
Begins - when cell forms
Ends - when cell divides to form two new cells
Mitosis occurs only in eukaryotic body cells (prokaryotes reproduce differently).
Mitosis
Prophase,Metaphase,Anaphase,Telophase.
Interphase
Cell grows and prepares for division
Organelles and chromosomes are copied Chromatids (copies) form and join at the centromere. The cell spends most of its time in this phase, and goes about normal cell activities.
Prophase
Nuclear membrane starts to dissolve
Chromosomes condense and become visible
Spindle fibers form from centrioles to pull each set of DNA to the new cells.
Metaphase
Chromosomes line up along the center of the cell
Spindle fibers attach to the centromeres of the chromatids
The nuclear membrane is gone.
Centrioles
Pairs of cylinderical orgenells.
Prophase
Spindle fibers attach to the centromeres of the chromatids.
Anaphase
Spindle fibers pull the chromatids apart toward opposite sides of the cell.
Telophase
Nuclear membrane forms around each set of chromosomes
In animal cells, a cleavage furrow, or indentation in the middle of the cell, appears and begins to divide the cell into two new cells.
Cytokinesis
The cell membrane pinches in and the cytoplasm is evenly divided forming two separate cells
The new cells are identical.