Term
|
Definition
| series of changes that a cell undergoes from the time is forms until it divides |
|
|
Term
|
Definition
| period of cell growth, maintains routine functions and contributes to internal environment |
|
|
Term
|
Definition
| composed of G1, S Phase, and G2 |
|
|
Term
|
Definition
| synthesis, when DNA is replicated & cell prepares for division |
|
|
Term
|
Definition
| gap/growth, when cell growth occurs |
|
|
Term
|
Definition
| gap/growth, when cell replicates organelles in preparation for cell division |
|
|
Term
|
Definition
| form of cell division that occurs in somatic (non sex) cells and produces two daughter cells from an original cell |
|
|
Term
|
Definition
| results in 2 genetically identical cells with 46 chromosomes each |
|
|
Term
|
Definition
| 2nd form of cell division that occurs only in the cells that give rise to sex cells (sperm and eggs). |
|
|
Term
|
Definition
| "nucleus movement" nuclear contents divide (during mitosis) |
|
|
Term
|
Definition
| "cell movement" cytoplasm divides (between 2 daughter cells) |
|
|
Term
|
Definition
| sequence of events: prophase, metaphase, anaphase, telophase |
|
|
Term
|
Definition
| chromosomes condense from chromatin and centrioles move to the poles, nuclear envelope and nucleolus disperse and are no longer visible, microtubules assemble in cytoplasm, spindle forms between centrioles |
|
|
Term
|
Definition
| spindle fibers attach to centromeres so that a fiber accompanying one chromatid attaches to one centromere and other chromatid attaches to other centromere, chromosomes align in center of cell |
|
|
Term
|
Definition
| centromeres separate - identical chromatids now considered individual chromosomes, spindle fibers contract and chromosomes move to opposite poles |
|
|
Term
|
Definition
| chromosomes complete their migration toward centrioles, chromosomes elongate, unwind from rodlike to threadlike (chromosomes to chromatin), nuclear envelope reforms, nucleoli become visible within newly formed nuclei, microtubules disassemble |
|
|
Term
|
Definition
| begins in anaphase when cell membrane starts to constrict in middle and continues through telophase |
|
|
Term
|
Definition
| newly formed cells may differ slightly in size and number of organelles and inclusions, but have identical chromosomes and contain identical DNA. |
|
|
Term
|
Definition
| musclelike contraction of a ring of actin microfilaments pinches off 2 cells from 1, microfilaments assemble in cytoplasm & attach to inner surface of cell membrane, contractile ring forms at right angles to microtubules that pulled chromosomes to opposite ends during mitosis, as ring pinches it separates 2 newly formed nuclei and apportions half of organelles into each daughter cell |
|
|
