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Biology 10B Ch. 9-10
Cellular Growth, Cell Cycle, and Miosis
Question | Answer |
---|---|
Stage in which the cell divides into two daughter cells with identical nuclei | Cytokinesis |
Substage of interphase immediately after a cell divides | Gap 1 |
Substage of interphase in which the cell copies its DNA in preparation for cell division | Synthesis |
Stage in which the cell's nuclear material divides and separates | Mitosis |
Main stage in which the cell grows, carries out normal functions, and duplicates its DNA | Interphase |
Substage in which the cell prepares for nuclear division and a protein that makes microtubles for cell division is synthesized | Gap 2 |
The cell grows. DNA is duplicated. | Interphase |
Chromosomes condense. The Nuclear membrane and nucleolus disappear. Spindle apparatus forms. | Prophase |
Sister chromatids line up at equator. | Metaphase |
Chromatids are pulled apart toward the poles. | Anaphase |
Chromosomes arrive at poles. Nuclear membranes and nucleolus reappear. Chromosomes decondense. | Telophase |
Cell divides. Two cells are formed. | Cytokinesis |
4 reasons cells divide. | To grow, repair, reproduce, and so they don't get too big |
The uncontrolled growth and division of cells | Cancer |
2 Identical strands of DNA | Chromatids (Sister Chromatids) |
Connects 2 sister chromatids | Centromere |
A segment for a chromosome that carries information for a protein for a specific trait | Gene |
Location in a gene; its "Address" on a chromosomes | Locus |
Cell that contains both sets of homologous chromosomes | Diploid cells (2n) |
Contain only a single set of chromosomes | Haploid cells (n) |
Sex cells and contain half the number of chromosomes (n) as somatic (body) cells | Gametes |
Chromosomal segments are exchanged between a pair of homologous chromosomes | Crossing over |
type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. | Meiosis I |
First stage of Meiosis I; Homologous chromosomes condense and form pairs during synapsis; spindle fibers form | Prophase I |
Second stage of Meiosis I; Pairs of homologous chromosomes line up at the cell's equator | Metaphase I |
Third stage of Meiosis I; Homologous chromosomes separate and move toward opposite ends of the cell | Anaphase I |
Forth stage of Meiosis I; Homologous chromosomes reach the cell's poles and cytokinesis usually occurs | Telophase I |
First stage of Meiosis II; Spindle apparatus form; chromosomes condense | Prophase II |
Second stage of Meiosis II; Chromosomes line up at the cell's equator | Metaphase II |
Third stage of Meiosis II; Sister chromatids are pulled apart by the spindle fibers and move toward opposite ends of the cell | Anaphase II |
Forth stage of Meiosis II; Chromosomes reach the cell's poles, the nuclear membrane and nucleolus re-form, and cytokinesis occurs; four cells form | Telophase II |
The second of the two consecutive divisions of the nucleus during meiosis | Meiosis II |