1. Mitosis vs. Meiosis

2. Essential Vocabulary!
Diploid - a cell that contains 2 copies of each chromosome (2n)
Body cells
Haploid – a cell that has only one copy of each chromosome (n)
Gametes (sperm & egg)

3. Mitosis
Diploid

4. Mitosis Review PMAT Occurs in body cells
Used for development, growth & repair
Produces two genetically identical cells
DNA is copied once and divided once
Parent cell and daughter cell are diploid

5. Meiosis: The Great Divide
Video Clip

6. Meiosis The process that forms gametes (sperm and egg)
Known as “reduction division” because it reduces the number of chromosomes
Only occurs in organisms that reproduce sexually
Crossing Over – process in which chromosomal segments are exchanged between a pair of homologous chromosomes
Results in genetic variation

8. Mitosis vs. meiosis Diploid Haploid 46 46 46 46 46 46 23 23 23 23
(Identical) 46 46
Diploid 46 46 23 23 23 23
Haploid
Ex. 2 skin cells, 2 muscle cells, etc.
Ex. 4 egg cells or 4 sperm cells