Scientists and composers have produced a new choral work in which performers sing parts of their own genetic code. Human DNA is made up of just four different chemical compounds, which gave musician Andrew Morley the idea of assigning a note to each of them. The new piece, Allele, will be performed by the New London Chamber Choir at the Royal Society of Medicine on 13 July. Each of the 40-strong choir has also had his or her own DNA decoded. "I'd sung quite a lot with choirs in my youth and I've written stuff myself, and so I was...