82 THE MENDEL JOURNAL 



this family. There have been three marriages of 

 individuals who had woolly hair { =D R) with persons 

 having European hair {=RR). The total number 

 of individuals concerned is thirty-six. Of these, 

 eighteen had negroid hair and eighteen had ordinary 

 hair. The segregation is complete, and the pro- 

 portions are in exact accordance with Mendelian 

 expectation. 



Another case in which a peculiarity of the hair 

 is the character considered is one where a congenital 

 tuft of white hair over the brow was hereditarily 

 transmitted through six generations. Only a single 

 member, the father, in each of the first three genera- 

 tions is known. And each of these possessed the 

 white tuft. The father of the third generation 

 married a normal person, and they had four children, 

 two with and two without the tuft. The white tuft 

 is a dominant character and the absence of it a 

 recessive one. One of the normal offspring in time 

 married a normal husband, and their children, three 

 in number, were all normals. The two children 

 with the tuft also married, and they had a mixed 

 offspring, some of the individuals having the tuft and 

 others not. Three individuals of this generation 

 without the tuft married normal persons, and in 

 their total offspring of eight members there was not 

 a single one with the tuft. Thus in the total of 

 eleven children born of four pairs of parents, one in 

 each pair being an extracted recessive and the other 

 a normal person, the dominant character did not 

 appear. That is, the Mendelian expectation that the 



