Answer:
1. Mitosis.
2. Mitosis and meiosis.
3. egg cell and sperm cell.
Step-by-step explanation:
Mitosis is a type of cell division in which a single cell divide into two daughter cells having double number of chromosomes whereas meiosis is a type of cell division in which a parent cell divides into four daughter cells having half number of chromosomes. mitosis occurs in the body cells whereas meiosis occurs in sex cells. If mitosis becomes uncontrolled it causes cancer whereas if meiosis becomes uncontrolled it causes genetic disorders.