Chapter 8- Cell Cycle And Mitosis Flashcards
Nucleus
DNA located here
DNA condensed into chromatin
Further condensed into chromosomes
Chromosomes in pairs- 23 pairs, 46 chr. (Homologous)
The Cell Cycle
Way of looking at entire lifespan of a cell
Begins when a cell is produced and ends when it divides
2 phases: interphase and cell division
Interphase
Normal state of the cell (growth, metabolism, functions)
G1, Synthesis, G2
G1 phase
Growth, high metabolism, protein synthesis
Each chromosome is a single DNA molecule
Synthesis phase
All DNA is replicated
Sister chromatids and centromeres
G2 phase
Preparatory stage for mitosis
Rapid growth
Cell division
Mitosis- division of the nucleus
Followed by
Cytokinesis, division of the cell itself
Mitosis
Prophase
Metaphase
Anaphase
Telophase
Prophase
Nuclear envelope disappears
Centromeres go to opposite poles, spindles form
Chromosomes condense
Spindles attach to centromeres
Metaphase
Chromosomes line up along equator
Anaphase
Centromeres of each chromosome divide in half (sister chromatids)
Spindle fibers pull sister chromatids toward poles
Telophase
Spindle fibers disappear
Nuclear envelope reforms
Chromosomes condense
Cytokinesis
Division of cytoplasm
Two identical daughter cells produced
In animal cells, plasma membrane cleaves
Stage where nucleus divides
Mitosis
stage that Makes up a major portion of most cells lives
G1
Stage in which cytoplasm divides
Cytokinesis
Stage in which the cell grows rapidly
G2
Stage where two identical nuclei are produced
Mitosis
Stage where DNA is replicated
Synthesis
Stage where sister chromatids form and become attached at the centromere
Synthesis
Stage where cell carries out its routine functions
G1
Stage where spindle fibers move sister chromatids
Mitosis
