Your Family Medical History Families treasure the moment a new child's face is first revealed.
Cameras snap as a debate rages over whom the baby most resembles.
Parents desperately, albeit secretly, each want agreement that their genes dominate the composition of the little one's features. Grandparents travel back in time as they see their own child reborn. Genes are codes of heredity stored in the DNA of almost every cell in the body. Children inherit about half their DNA from their mother and half from their father. Every day, scientists find clues about genes they hope will unravel many mysteries of life.