Mitosis Flashcards
Prophase
The first phase. Chromosomes are condensed. The chromosomes are visible. Spindle fibers begin to form. Mitotic spindle. Nuclear Envelope breaks down.
Metaphase
The second phase. Chromosomes are pulled to the center line up on the metaphase plate; imaginary line. Spindle fibers attach to the centromeres.
Anaphase
Third phase. Centromeres divide. Spindle fibers pull the sister chromatids apart taking them to the separate poles. They are now 2 daughter chromosomes.
Telophase
Fourth and final phase. Nuclear envelope forms. Chromosomes divide to form 2 cells. Spindle fibers disassemble. Cytokinesis begins.
Cytokinesis
The division of the cytoplasm to form two separate daughter cells immediately after mitosis, meiosis I, or meiosis II.
Sister Chromatids
Two copies of a duplicated chromosome attached to each other by proteis at the centromere and sometimes, along the arms. While joined, two sister chromatids make up one chromosome. Chromatids are eventually separated during mitosis or meiosis II.
Interphase
The period in the cell cycle when the cell is not dividing. During interphase, cellular metabolic activity is high, chromosomes and organelles are duplicated, and cell size may increase. Interphase often accounts for about 90% of the cell cycle.
asexual reproduction
One parent. Creates genetically identical duplicates.
Sexual reproduction
Two parents. Combination of genetic material.
Mitotic Phase
Prophase, Metaphase, Anaphase, Telophase
G1
First Growth phase takes 9 hours
S (synthesis)
Chromosome replication occurs in nucleus takes approximately 10 hours
G2 (gap 2)
Second Growth Phase cell synthesize organelles and other material takes 2 hours.