The proposition that finger print variability between individuals might be 
reduced by the absence of an X-chromosome in Turner's syndrome was rejected. In 
the present study of 58 XO patients, aged 15-50 years, relatives of several 
cases, unrelated female control samples and three unrelated male samples were 
investigated. The higher mean value of the TRC among patients supported the 
hypothesis forwarded by Penrose that an added X- or Y-chromosome reduces the TRC 
and a missing one increasing it. The figures do not speak against the hypothesis 
that genes affecting the TRC are located on the X-chromosome. A summary of the 
major dermatoglyphic investigations in Turner's syndrome is presented.