PHYSICAL CHARACTERS IN MAN 6- 



both of whom evidently carried albinism recessive. 

 No. III. 3 had seven normal sons, five of whom 

 married, but only one of them had albino children. 

 This family numbered three normal sons, and nine 

 daughters, four of whom were albinos. The mother 

 again must have carried albinism as well as the 

 father, if the condition is, as usual, a strict recessive 

 (see p. 70). 



In another record of Sedgwick, two grandsons in 

 a Swiss village had each two daughters, one normal 

 and one albino. The albino great-granddaughters 

 married. One had no children, the other had an 



I 



n 



EL 



m 



D^O 



xO 



^'xU 



CF 



X O 



O X 



V 



Sisters 



^~^~^M, 



thery 

 ch/ 



4 ^5 A-.6 r^7 j^e J^9 J^IO ^ 



xQ 



4*«*66660 



Fig. 12. — Pedigree of Albinism in a Family. 



imperfect albino by a husband with black hair and 

 brown eyes. There was probably intermarriage in 

 both these lines of descent. 



Little (1920) mentions that a piebald coat charac- 

 terises such breeds of dogs as foxhounds, beagles, 

 Boston terriers, St. Bernards, and collies. The 

 spotting reaches an extreme in bull terriers where 

 normally only the eyes are pigmented. The origin 

 of spotted individuals from t3'pical ancestors is 

 recorded in two pure breeds of pedigree dogs, and 

 it is considered that they may have arisen through 

 mutations. In the first a spotted female was born 

 from two solid-coloured pedigreed and registered 



