Cell Cycle, Interphase, and Stages of Mitosis (Leaving Cert Biology): Flashcards
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Cell cycle definition
Cell cycle definition
Series of events between one cell division and the next
Three main parts of the cell cycle
Three main parts of the cell cycle
Interphase, nuclear division, cytokinesis
Longest phase of the cell cycle
Longest phase of the cell cycle
Interphase (over 90% of total cycle time)
Cell activity during interphase
Cell activity during interphase
Very active - growing, making organelles, replicating DNA
When DNA replication occurs
When DNA replication occurs
During interphase (before mitosis begins)
Chromosome structure after DNA replication
Chromosome structure after DNA replication
Two identical chromatids joined at the centromere
Number of daughter cells from mitosis
Number of daughter cells from mitosis
Two identical daughter cells
Four stages of mitosis in order
Four stages of mitosis in order
Prophase, Metaphase, Anaphase, Telophase (PMAT)
Key events in prophase
Key events in prophase
Chromosomes condense and become visible, spindle fibres form, nuclear membrane breaks down
Where chromosomes align during metaphase
Where chromosomes align during metaphase
At the middle (equator) of the cell
What happens during anaphase
What happens during anaphase
Chromatids pulled apart to opposite ends of the cell
Key outcome of telophase
Key outcome of telophase
Two new nuclei form at opposite ends of the cell