Skin reflectance of Quechua Indians: The effects of genetic admixture, sex and age

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Abstract
The skin reflectance characteristics of a group of Quechua Indians have been described with an emphasis upon the effects of varying degrees of hybridization, sex and age. This group of Peruvian Indians occupied a reflectance range common to that of all other reported groups of South American Indians. Miscegenation with European Whites had a statistically significant although small influence upon skin color. In general males were consistently darker than females on the three body sites measured. A significant darkening on unexposed body areas occurred in both sexes during early adolescence which may have been caused by the high activity level of the pituitary gland at that stage of the growth cycle.

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