Somatic Cell Division
Undergoes Nuclear (mitosis); Cytoplasmic (cytokinesis). Any cell but a reproductive cell. Replaces dead or injured cells & is replaced with new ones.
Reproductive Cell Division
Undergoes Nuclear (meiosis); Cytoplasmic (cytokinesis). Occurs only in reproductive cells.
Cell Cycle (the 3 stages)
Interphase: G1 (Growth), S (sythesis), G2 (Growth). All the events of life of a cell.
Mitosis: prophase, metaphase, anaphase, telophase.
4 Stages: Prophase, Metaphase, Anaphase, Telophase; two daughter cells have the same genetic info, they divide.
Chromatin coil into chromosomes; Nucleoli & nuclear membrane disappear; Centrioles separate & move to opposite poles of cell; Mitotic spindle forms. (Mitosis)
Centromeres of chromatid pairs line up at the middle of the cell. (Mitosis)
Centromeres divide & identical sets of chromosomes move to opposite poles. (Mitosis)
Chromosomes resume chromatin threadlike shape; Nuclear membrane re-appears; Encloses chromatin (DNA); Nucleolus reappears; Mitotic spindle breaks up. (Mitosis)
Cleavage furrow forms around center of cell, separates cytoplasm into two separate & usually portions (daughter cells). The division of cytoplasm. (Mitosis)
Cell Cycle completed in how many hours?
20 hours (interphase 19 hours), (mitosis 1 hour).
Replication of chromosomes (DNA); normal cell activities; time between cell divisions.
Nuclear envelope begins to disappear; Nucleolus disappears; Chromatin condenses to chromosomes. A continuous process.
Centrioles separate & move to opposite sides of cell; spindle fibers form between centrioles.
Chromosomes line up in middle of cell; attached to spindle by centromeres.
Centromeres divide; identical sets of chromosomes move to opposite poles of cell; pulled away from eachother; Single chromosomes; separation of centromeres.
Chromosomes resume chromatin form; Nuclear membrane reappears; Nucleous reappears; Spindle breaks up; two cells next to eachother; the division of cytoplasm.
Cleavage furrow forms around center of cell, separates cytoplasm into two daughter cells.
I P M A T
"I will pass my anatomy test" I = interphase, P = prophase,
M = Metaphase, A = anaphase, & T = telophase.
Several thread-like bodies consisting of chromatin that carry the gene's in a linear order. Human's have 23 pairs.
The substance of a cell nucleus, consisting of DNA, RNA, and various proteins, that forms chromosomes during cell division.
One of two identical chromosomal strands into which a chromosome splits longitudinally preparatory to cell division.