-Name____________________________ Period______
Cell Growth and Reproduction Notes
Why do cells divide??
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Cells divide__________________________.
As organisms ___________________ and _________________, worn out tissues are ________________ or
______________________ by newly produced cells.
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The Cell cycle is the sequence of ___________________ growth and _________________ of a cell.
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The growth period is called _______________________________.
During interphase the cell:
o ________________
o Carries on basic life processes

o Makes _________________ of DNA for cell division
The division period is called ____________________________.
Chromosomes

____________ are cell structures that carry ____________ ____________. They contain DNA.

Chromosomes are ____________ present in cells.

The ____________ ____________ is passed from ____________ to generation.
The structure of chromosomes
 During most of the cells life, chromosomes exist as ____________, which are ____________ of
____________.

In what cell organelle is this found? _____________________!

As the cell begins to divide the chromatin ____________ forming ____________,
____________ chromosomes.

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They are ____________________ copies of each other
The sister chromatids are held together by a ______________________.
Mitosis
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Interphase
Prophase
Metaphase
Anaphase
Telophase (& Cytokinesis)
Interphase:
Stage of GROWTH before mitosis begins

Chromosomes are _______________________. (# doubles)

Chromosomes are called _____________________________.
Prophase: 1st step in Mitosis

______________________ (or poles) appear and begin to move to opposite end of the cell.

____________________________ form between the poles.
Metaphase: 2nd step in Mitosis

___________________________(or pairs of chromosomes) attach to the spindle fibers

Chromosomes line up in the MIDDLE
Anaphase: 3rd

step in Mitosis
___________________________ (or pairs of chromosomes) separate and begin to move to opposite
ends of the cell.
Telophase: 1st step in Mitosis

Two new __________________ form

______________________ ends.
o
Cytokinesis:

Cell membrane pinches together to create two _______________ cells- each with it’s
own _______________________ with identical ___________________________
E. Describe the cause of cancer on a basic cellular level
What are the leading causes of death in the United States:
1.
2.
3.
4.
What is Cancer?
Cancer: Uncontrolled cell growth creating a malignant tumor
Mutation:


Occasionally a cell is _________________________.
The mutated cell will continue to divide creating what could be cancer
What increases chances of cell mutation?
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