Abstract
The dermatoglyphics of 61 47, XYY patients and 166 46, XY controls were compared. The data on 50 47, XYY and 50 46, XY individuals were used to formulate an index score for any unknown having a 47, XYY karyotype. One hundred and sixteen 46, XY individuals were tested on this index and only 65 were correctly diagnosed as 46, XY males. Two 47, XYY individuals were tested and were correctly diagnosed. This result indicates that discrimination of 47, XYY from 46, XY individuals is not possible using the dermal patterns examined here. The data of this survey confirm the variability of dermal findings in 47.XYY individuals reported by others. The data do not agree, however, with reports of significant differences between 47.XYY and 46, XY individuals in the total finger ridge count, the palmar a‐b ridge width and count, and the distal sole hypothenar area. These results indicate that the extra Y chromosome does not significantly affect the dermal patterns of 47, XYY patients.
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