Download Mitotic Cell Cycle - Antelope Valley College

Mitotic Cell Cycle
Binary
Fission
Mitotic Cell Cycle
Interphase
• DNA replicates during
S period.
Replication: The difference between
homologous chromosomes and sister chromatids
Phases of Mitosis
Prophase
• Chromosomes coil, condense,
shorten, and become visible.
• Spindle forms.
Prometaphase
• Nuclear envelope
disappears.
• Nucleolus disappears too.
Metaphase
• The spindle microtubules
align the chromosomes in
the middle of the spindle.
Anaphase
• The centromeres divide
and the microtubules pull
the chromatids apart
toward opposite poles.
Early Telophase
• The chromosome arrive at
opposite poles, uncoil and
elongate.
• Spindle disappears.
Late Telophase
• Nuclear membrane forms
around each set of
chromosomes.
• Nucleolus reappears.
The Resulting Daughter Cells
• Are genetically identical,
each with the same
chromosome number
as the parent cell.
Cytokinesis in Animal Cells:occurs by actin
filaments pinching the cell in two
Cytokinesis in Plant Cells: a new cell wall is
laid down to divide the two daughter cells
Question 1
• In mitosis, if a parent cell has 24
chromosomes, each daughter cell will have
how many chromosomes?
• A. 48
• B. 72
• C. 12
• D. 24
• E. 6
Question 2
•
•
•
•
What happens during anaphase of mitosis?
A. chromosomes condense.
B. chromosomes align on the cell equator.
C. chromosomes are pulled apart by spindle
fibers.
• D. cells split in two.
• E. none of the above.
Question 3
• Chromosomes are duplicated during which
period?
• A. metaphase.
• B. G1 period.
• C. S period.
• D. anaphase.
• E. G2 period.
Answers
• Question 1: D
• Question 2: C
• Question 3: C