Mitosis and meiosis are both types of cell division, BUT 
Mitosis is when a cell divides to produce two identical cells. 
This is for renewing cells and repairing wounds etc.  
Meiosis devices a parent cell into two haploid cells (half the  
chromosomes) these haploid cells (sperm in males eggs in females) 
combine to form a diploid gamete (first cell of a baby) so meiosis is 
the sex cells.