The first stage, division of the cell nucleus, is called
The second stage, division of cell cytoplasm, is called
pass on genetic information from one generation to the next.
What do chromosomes do?
cell division, copied
Before _______ _________, each chromosome is duplicated, or ______.
Each chromosome consists of two identical "sister" __________.
The area that each pair of chromatids is attached is called the _____________.
When the cell divides the ______________ separate.
Each new cell gets one __________________.
the period of growth that occurs between cell division.
a cell grows, prepares for division, divides to form two daughter cells, each of which begins the cycle again.
What happens during the cell cycle?
G1 (first gap phase), S Phase (synthesis), G2 (second gap phase), M phase (cell division)
What are the four phases of the cell cycle?
increases in size, synthesizes new proteins and organelles
During G1, the cell:
chromosomes are replicated, DNA synthesis takes place
During the S phase:
enters, cell cycle
Once a cell __________ the S phase, it usually completes the rest of the ________ _____________
organelles and molecules required for cell division are produced
During the G2 phase (second gap phase):
Once G2 is complete the cell is ready to start the M phase- ____________.
Prophase, Metaphase, Anophase, Telophase
What are the four phases of mitosis?
What is the longest and first phase of mitosis?
The __________ separate an take up positions on the opposite sides of the nucleus.
in a region called the centrosome
Where do the centrioles lie?
helps to organize the spindle, a fanlike microtubule structure that helps separate the chromosomes.
What do centrisomes do?
_____________ condenses into chromosomes.
The centrioles _________ and a spindle begins to form.
The ____________ _____________ breaks down.
the second phase of mitosis
The chromosomes line up across the center of the cell. Microtubules connect the centromere of each chromosome to the poles of the spindle.
What happens during metaphase?
the third phase of mitosis
The sister chromatids separate into individual chromosomes. The chromosomes continue to move until they have separated into two groups.
What happens during anaphase?
fourth and final phase ofmitosis
Chromosomes gather at the opposite ends of the cell and lose their distinct shape. A new nuclear envelope forms around each cluster of chromosomes.
What happens during telophase?
During cytokinesis, the __________ pinches in half.
Each daughter cell has an identical set of ___________ _________.
In plants, a structure known as a _________ ___________ forms midway between the divided nuclei.
The cell plate gradually develops into a separating ______________ .
A __________ __________ then begins to appear in the cell plate.