Tiny genetic mutation behind golden locks

Blondes have been both prized and mocked by people for their golden locks for ages.

Lock and key mechanism behind human fertility

Researchers at Leeds and Bradford have discovered a unique ``DNA signature`` in human sperm, which may act as a key that unlocks an egg``s fertility and triggers new life.

Lock and key mechanism behind human fertility

Researchers at Leeds and Bradford have discovered a unique ``DNA signature`` in human sperm, which may act as a key that unlocks an egg``s fertility and triggers new life.