New Scientist reports a study that tries to link musical abilities to genes that control social bonding. From the abstract of the study:

Composing, improvising and arranging music are complex creative functions of the human brain, which biological value remains unknown. We hypothesized that practicing music is social communication that needs musical aptitude and even creativity in music. ...Data on creativity in music (composing, improvising and/or arranging music) was surveyed using a web-based questionnaire. Here we show for the first time that creative functions in music have a strong genetic component in Finnish multigenerational families. We also show that high music test scores are significantly associated with creative functions in music