$(1)$ Definition / Explanation: Mitosis
$(2)$ Definition / Explanation: Meiosis

(N/A) $(1)$ Mitosis is a type of cell division in which a parent cell divides to produce two identical daughter cells,each having the same number of chromosomes as the parent cell.
$(2)$ Meiosis is a specialized type of cell division that reduces the chromosome number by half,resulting in the production of four haploid daughter cells (gametes),each containing half the number of chromosomes compared to the parent cell.