| A | B |
|---|
| mitosis | The process by which a cell divides its nucleus and contents. |
| chromosome | A long thread of DNA that consists of numerous genes. |
| prophase | The first phase of mitosis when chromatin condenses, the nuclear envelope breaks down, and the nucleus disappears. |
| metaphase | The second phase of mitosis when spindle fibers align the chromosomes along the cell equator. |
| anaphase | The third phase of mitosis during which chromatids separate and are pulled to opposite sides of the cell. |
| telophase | The last phase of mitosis when a complete set of identical chromosomes is positioned at each pole of the cell, the nuclear membranes start to form, the chromosomes begin to uncoil, and the spindle fibers disassemble |
| asexual reproduction | The process by which offspring are produced from a single parent. |
| histone | Type of protein that organizes and condenses chromosomes. |
| telomere | Repeating nucleotides at the ends of DNA molecules that do not form genes and help prevent the loss of genes. |
| cancer | The common name for a class of diseases characterized by uncontrolled cell division. |
