Later in this lesson, you'll learn more about each phase in the cycle of cell division, which allows cells to multiply for the good (or bad) of an organism. Before you move on, though, it's important to make sure you understand the basics. Use the activity below to review and learn the order in which cell cycle phases occur. Continue trying the activity until you are able to arrange the phases correctly.
|
G1 - when the cell "decides"
to divide (no activity) G0 - the resting phase
G2 - the cycle's second
pause in activity M phase - when mitosis
and cytokinesis occur S phase - when chromosomes
are duplicated |
|
Can you easily recall the phases of the cycle and the order in which they occur? If so, use the flash cards below to make sure you've learned the finer points of cell division. Continue working through the flash cards until you can answer all the questions correctly.
In terms of the cell cycle, what causes cancer?
abnormal, out-of-control cell division
What is happening when a lizard grows a new tail to replace one it lost?
regeneration as a result of cell division
What kinds of cells are cheek cells?
somatic cells (body--not reproductive--cells)
What happens during the G0 phase of the cell cycle?
resting, either between cell cycles or because the cell has stopped dividing
What is the general name given to G1 & G2?
the gap phases - periods between actual activity
Which phases are included in the interphase of the cell cycle?
G1, S, and G2 phases
What happens during the S phase?
the duplication of chromosomes, in preparation for division (also known as synthesis)
What does the M phase include?
mitosis and cytokinesis
What happens during mitosis and cytokinesis?
the cell actually divides, or separates into two cells
If you reduce the cell cycle to just two overall phases, what would those phases be?
the interphase (G1-S-G2) followed by the M phase (mitosis and cytokinesis)
Summary
Correct:
Incorrect:
