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The Journal of Heredity 1985:76(5):390-392
© 1985 The American Genetic Association 76:390-392

other

Genetic analysis of the pinna of the human ear: sex differences in college age adults

E. Edward Peeples, Linda K. Dixon, and Warren R. Buss

Drs. Peeples and Buss are affiliated with the Department of Biological Sciences, University of Northern Colorado, Greeley, Colorado 80639; Dr. Dixon is affiliated with the Department of Natural and Physical Sciences, University of Colorado at Denver, Colorado 80202. The authors thank Gilbert Kaiser for the design and construction of the photographic frame. The work was funded in part by a grant from the Faculty Research and Publication Committee of the University of Northern Colorado.

Abstract

Photographs of the left ears of 113 male and 197 female students of the University of Northern Colorado were taken using a 35mm camera with 50mm lens, small electronic flash, +4 close-up lens, and ASA 100 color film. Camera and flash attachment were mounted on a light metal frame positioning the camera 90 degrees to the head and a specific distance from the ear. Metric scale and counter were mounted so they were visible in the photograph. Eight vertical measures and eight horizontal measures were made, and 15 subjective-objective data taken. Means, variances, and interrelationships were determined. Mean height for males was approximately five inches greater than for females. Vertical measures were standardized by expressing ear/body height as a ratio. Three vertical measures—width of the superior helix, distance from superior helix to the edge of antihelix, and distance from antihelix to tip of the lobule—and three horizontal measures—width of the pinna, width of the posterior helix, and width of the notch—appear to be under specific genetic regulation in the two sexes.


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