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B.Loeffler
Mitosis
10
Science
7th Grade
01/28/2010

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Term
Cell Division
Definition
the formation of two daughter cells from a single parent cell
Term
Centriole
Definition
a cylindrical organelle in animal cells that is involved in cell division
Centrioles form spindle fibers which separate chromosomes during cell division
Term
Centromere
Definition
the part of a chromosome where the chromatids are attached
During mitosis spindle fibers attach to the chromosome at the centromere
Term
Chromatid
Definition
one of two identical halves of a replicated chromosome
Term
Chromatin
Definition
DNA strands in the nucleus during interphase
Chromatin stains dark making it relatively easy to see (the Greek root "chroma" means "color"
Term
Chromosome
Definition
a structure formed from condensed chromatin
Chromosomes consist of two identical chromatids attached at the centromere, giving them a characteristic X shape
Chromosomes occur in pairs. Human cells have 23 pairs of chromosomes, of 46 total chromosomes
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 equal division of the chromosomes into two genetically identical daughter nuclei.Mitosis consists of four stages
Prophase-chromosomes form from condensed chromatin
Metaphase- the chromosomes line up along the center axis of the cell
Anaphase- the chromosomes split up and chromatids are pulled to opposite ends of the cell
Telophase- a new nuclear membrane forms around each set of chromatids
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