Historical Document
Kansas Agricultural Experiment Station
SEX IDENTIFICATION IN PUREBREDS
BARRED PLYMOUTH ROCKS
It had long been recognized that the size of the light head
spots in Barred Plymouth Rocks varied in the two sexes. The
males tend to have larger headspots and the females to have...
Both. They both have the white dots. You're thinking of sexlinks where only the male has a dot. On male BRs, usually the headspot if larger and blotchier than on the female, but not always.