Pitted ear is a relatively rare human anomaly defined as a pit in the proximal end of the upper part of the helix. This hereditary malformation has been studied in three different families, not known to be related. Pedigree charts prepared for these families show that one hundred and twenty-seven individuals are involved, of which twenty-four show pitted ear. This physical trait varies greatly throughout the families: the size of the pits ranges from approximately that of a pin head to about that of a match stick; and in depth, from about one-sixteenth to one-half inch. This trait is usually unilateral in its expression, but appears about as often in one ear as in the other; and there are some cases in which it is found in both ears. This character is not inherited as a simple Mendelian dominant, but rather an irregular dominance is suggested.
Proceedings of the Iowa Academy of Science
© Copyright 1941 by the Iowa Academy of Science, Inc.
Stiles, Karl A.
"The Inheritance of Pitted Ear (Abstract),"
Proceedings of the Iowa Academy of Science: Vol. 48:
, Article 125.
Available at: https://scholarworks.uni.edu/pias/vol48/iss1/125