Download Concept 9.2 The Cell Cycle Multiplies Cells

BIOLOGY
Chapter 9: The Cellular Basis of inheritance
Name:________________________
Section Goal: The student will describe how cell reproduction contributes to repair and growth and contrast the
two main ways that organisms reproduce.
Vocabulary:
1. asexual reproduction
2. sexual reproduction’
3. chromatin
4. chromosome
5. sister chromatid
6. centromere
7. cell cycle
8. interphase
9. mitotic phase
10. mitosis
11. cytokinesis
Concept 9.1: All cells come from cells
I. Repair and Growth
A. The___________________________________ layer of your skin is actually a layer of dead cells
B. Underneath the outer layer is a layer of __________________ cells that are constantly reproducing
and moving ___________________________ to replace the dead cells that have been rubbed off
C. Another function of cell division is _______________________, from one fertilized egg cell there
are ____________________________ of cells in your body
II. Reproduction
A. Cell production of ____________ cells can result in _______________ ________organisms, cell
division also has an essential role in the reproduction of __________ organisms
B. _____________________________________ is when an organism inherits all of its genetic
material from _________________ parent
C. ______________________________________ is when an organism inherits its genetic material
from ______________________ parents
D. All multicellular organisms depend on ____________________ division for growth
Section Goal: The student will describe the structure of a chromosome and name the stages of the cell cycle
and then explain what happens during each stage.
Concept 9.2 The Cell Cycle Multiplies Cells
I. Chromosomes and Cell Division
A. In eukaryotes, most of the _______________________ material is located within the nucleus as a
mass of very long fibers, made of DNA and proteins called __________________________
B. When chromatin ______________________________ it becomes visible as the compact structure
________________________________
C. Before cell division occurs, a cell ______________________ all of its chromosomes, the identical
copy is called a sister __________
D. The sister chromatids are joined together in a region called the _________________________
Figure 9-4, pg. 183
II. The Cell Cycle
Cells that divide undergo an orderly sequence of events known as the ______________________, which
is from the “birth” of the cell to the time it __________________________________ itself
Interphase
Accounts for about ______________ of the cell cycle
Cell grows – ___________ phase (Gap)
DNA duplicates – ______________ (Synthesis)
Cell prepares to divide – _____________ phase
Mitotic Phase
Cell is actually dividing – _________________
Two processes:
_________- nucleus and chromosomes form “daughter cells”
________________________- cytoplasm is divided in two
Lesson Reflection:
Using the handout labeled The Mitotic Phase, complete the diagram using the information from page
184 (Figure 9-6) in your book.
Lesson Assessment:
1. Relate cell reproduction to the replacement of skin cells.
2. Describe two ways in which asexual and sexual reproduction differ.
3. How is cell division involved in growth?
4. Summarize the events that occur during mitosis and cytokinesis.
Summary of Key concepts:
Complete the Summary of Key Concepts for sections 9.1 and 9.2 and turn into the box.
Technology/Application/Connection to real-world: