Cell Cycle Flashcards
What is the purpose of cell division?
- growth development
- repair injured tissues
- reproduction
Interphase
longest stage, growth and preparation
- preparing for mitosis
- DNA is copied into identical strands
What is mitosis
division of contents of nucleus
Name the Four stages of Mitosis
Prophase, Metaphase, Anaphase, Telophase
Prophase
chromatin condenses into chromosomes, nuclear membrane dissolves
Metaphase
chromosomes line up in middle on metaphase plate
Anaphase
centromere splits and sister chromatids separate into chromosomes (now called
daughters chromosomes) and move to opposite sides of cell
Telophase
new nuclear membrane forms around chromosomes
chromosomes uncoil to make chromatin, not split yet
Cytokinesis
division of cytoplasm and organelles
produces two genetically identical daughter cells
What helps each cell split?
animal cell: contractile ring to break in 2
plant cell: cell plate forms in middle to form cell wall, then splits