Ever since the cell was recognized as the basic unit of life almost 200 years ago, biologists have been on a quest to characterize and classify the myriads of distinct cell types that make up each ...

Interphase The cell spends most of its life in this phase. The DNA in chromosomes copies itself ready for mitosis. Prophase The DNA in chromosomes and their copies condenses to become more visible.

Microscopes are needed to study cells in detail. Cell division - AQA Chromosomes carry genetic information in a molecule called DNA. A type of cell division called mitosis ensures that when a cell ...