Human chromosomes (artificially coloured) vary widely from cell to cell, according to an investigation of the DNA in more than 100 cells from a single person. Credit: Cavallini James/BSIP/Science Photo Library
In a technological tour-de-force,…

Human chromosomes (artificially coloured) vary widely from cell to cell, according to an investigation of the DNA in more than 100 cells from a single person. Credit: Cavallini James/BSIP/Science Photo Library
In a technological tour-de-force,…