2006 marked the 50th anniversary of the discovery of the human chromosome number, establishing human cytogenetics as a scientific discipline and setting the basis for modern medical genetics. First Years of Human Chromosomes draws together the ground-breaking work of the main researchers in the key period 1955 to 1960. The book is based on interviews with these researchers and descriptions of the major research findings, giving a strong sense of the excitement and thoughts of those involved. To complete the picture, it also features a CD of the recorded interviews.