What process occurs during asexual reproduction

Hey,
Before a cell divides, its nucleus divides. Each chromosome is copied, and each nucleus receives the same genetic material: genes, made of DNA. As each cell divides into two, the resulting "daughter" cells are therefore exact copies of one another.
Normal cell division is also the basis for asexual reproduction. Only one type of cell is involved, with no input from another individual. Because no new genetic material is introduced, there is no variation in the resulting offspring. Since the offspring from this process contain the same genetic material as one another (and the same as the original single parent), they can be described as a clone.

Very hard to understand