1. CHAPTER 8 The Cellular Basis of Reproduction and Inheritance
Modules 8.1 – 8.3

2. How to Make a Sea Star — With and Without Sex
The life cycle of a multicellular organism includes
development
reproduction
This sea star embryo (morula) shows one stage in the development of a fertilized egg
The cluster of cells will continue to divide as development proceeds

3. Some organisms can also reproduce asexually
This sea star is regenerating a lost arm
Regeneration results from repeated cell divisions

4. CONNECTIONS BETWEEN CELL DIVISION AND REPRODUCTION
Cell division is at the heart of the reproduction of cells and organisms
Organisms can reproduce sexually or asexually

5. 8.1 Like begets like, more or less
Some organisms make exact copies of themselves, asexual reproduction
Figure 8.1A

6. Other organisms make similar copies of themselves in a more complex process, sexual reproduction
Figure 8.1B

7. 8.2 Cells arise only from preexisting cells
All cells come from cells
Cellular reproduction is called cell division
Cell division allows an embryo to develop into an adult
It also ensures the continuity of life from one generation to the next

8. 8.3 Prokaryotes reproduce by binary fission
Prokaryotic cells divide asexually
These cells possess a single chromosome, containing genes
The chromosome is replicated
The cell then divides into two cells, a process called binary fission
Prokaryotic chromosomes
Figure 8.3B

9. Binary fission of a prokaryotic cell
Plasma membrane
Prokaryotic chromosome
Cell wall
Duplication of chromosome and separation of copies
Continued growth of the cell and movement of copies
Division into two cells
Figure 8.3A