Unit 3.3: Cell Division: Mitosis. Vocabulary:. Chromatin : uncondensed, loosely-coiled DNA Chromosome : condensed, tightly-coiled DNA Histones : proteins around which DNA coils to become more tightly coiled
Chromatin: uncondensed, loosely-coiled DNA
Chromosome: condensed, tightly-coiled DNA
Histones: proteins around which DNA coils to become more tightly coiled
Chromatid: half of a duplicated chromosome, includes a short arm (p arm) and a long arm (q arm)
Centromere: constriction that joins two sister chromatids of a chromosome at the vertical “center”
Mitosis: phases of the cell cycle during which the chromosomes replicate and the nucleus divides into two daughter nuclei; sometimes called karyokinesis.
Cytokinesis: phase of the cell cycle in which the cell divides into two daughter cells, each with its own nucleus.
G1 Phase: Gap 1; cell growthoccurs
S Phase: S = synthesis; during this phase, DNA is synthesized, (replicated) in preparation for mitosis
G2 Phase: Gap 2; the cell goes through “checkpoints” to make sure cell is ready for mitosis/cell division
DNA in chromosome form, for easier “sorting” into daughter cells
each other, move to opposite sides of the mitotic spindle