
The Mapping of Human Chromosomes
The goal is to locate a gene In relation to others and to establish which of the 23 chromosome pairs carries it. This is done primarily by applying statistical techniques to data on inheritance of traits

The Mapping of Human Chromosomes
The goal is to locate a gene In relation to others and to establish which of the 23 chromosome pairs carries it. This is done primarily by applying statistical techniques to data on inheritance of traits

General Tom Thumb and Other Midgets
He was a midget of a type that has not been known to lack pituitary hormone. Now it is clear that such midgets have a deficiency of the pituitary's growth hormone, which indicates that they can be treated

The Royal Hemophilia
A disease caused by the inheritance of a defective X chromosome, it has plagued European royalty for three generations. Queen Victoria was the first carrier of the mutation, 'which may not yet be extinct

Heart Sounds
For more than a century physicians have listened to the slapping of the valves in the heart with the stethoscope. Now these sounds can be subjected to refined analysis with modern electronic gear