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T Poteet
mitosis-cell division
10
Science
7th Grade
01/28/2010

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Term
cell division
Definition
the formation of two daughter cellsfrom a single parent cell.
Term
centriole
Definition
a cylindrical organelle in an animal cell that is involved in cell division.
centrioles form spindle fibers which seperate chromosomes during cell division
Term
centromere
Definition
the part of a chromosome where the chromatids are attached.
during mitosis spindle fibers attach to the chromosomes at the centromere
Term
chromatid
Definition
one of two identical halves of a replicated chromosome
Term
chromatin
Definition
DNA strands in the nucleus during the interphase.
chromatin stains dark making it easy to see
Term
chromosome
Definition
a structure formed from condensed chromatin.
chromosomes consist of two identical chromatins attached at the centromere giving them a characteristic X shape.
chromosomes occur in pairs human cells have 23 pairs of chromosomes or 46 totalchromosomes
Term
cytokinesis
Definition
the division of the cytoplasm of the cell to form two daughter cells.
Term
DNA
Definition
a molecule that carries genetic information.
DNA stands for deoxyribonucleic acid.
Term
interphase
Definition
the period in the cell cycle during which the cell grows, matures, and duplicates genetic information
Term
mitosis
Definition
the eqaul division of the chromosomes inton two genetically identical daughter nuclei. mitosis consist of four stages.
during prophase chromosomes form from condensed chromatin.
during metaphase the chromosomes line up along the center axis of the cell.
during anaphase the chromosomes split up and chromatins are pulled to opposite ends of the cell.
during telophase a new nuclear membrane forms around each set of chromatids.
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