Sir Tom Jones has revealed that he plans to have a DNA test to find out if he has black ancestry. The 75-year-old singer said he was often mistaken for being black, partly because people made an assumption when they heard his deep voice but also partly because of his thick, curly hair.He said that, as a result, he had decided to find out more about his heritage."A lot of people still think I'm black. When I first came to America, people who had heard me sing on the radio were surprised I was white. Because of my hair, a lot of black people still tell me I'm passing as white," Jones told The Times Magazine.When he was born, his mother was asked if she had any "black blood"."My mother came out in big dark patches on her body. They asked if she had any black blood; she said she didn't know. I want to know," he said.Jones was born in Pontypridd, South Wales. His mother, Freda, was of Welsh and English ancestry and his father of English descent. ..