1. Comparing Mitosis and Meiosis
CELL CYCLE
Comparing Mitosis and Meiosis

2. Results in two cells Results in four cells
Chromosome # is maintained (diploid)
Both are forms of cell division
Chromosome # is reduced by half (haploid)
Creates genetically identical cells
Both involve similar steps
Creates genetically unique cells
MITOSIS
MEIOSIS
Results in two cells
Both involve chromosome replication
Results in four cells
Makes somatic (body) cells
Both are followed by cytokinesis
Makes gametes (sex cells)

3. Variation
Variation is defined as the differences between members of a population

4. Variation (cont.) Variation occurs:
During meiosis by the random separation of homologous chromosomes
During prophase I during crossing over
During fertilization by the random combination of haploid gametes

5. Variation (cont.) Variation is the key to survival
If an environmental change occurs, a genetically diverse population has a better chance of survival