98 



FAMILY STUDIES IN BUILD. 



Mating 4. Slender x Very Fleshy Matings (Table IX) . 



Another test of dominance of the fleshy factors is afforded by table 

 IX. The details will be found in the following pages. The distribu- 

 tion of the progeny is indicated in table 29. The sums of table 29, 

 reduced to percentages, are: 12.5 S, 42.5 M, 35 F, 10 VF. On the 

 4-zygotic-factor hypothesis of build, an equality of medium and fleshy 

 progeny is expected. On the 6-factor hypothesis, a 5 X 2 mating 

 would produce two types of families. Averaging these two types, the 

 expected proportions are 9 S, 41 M, 41 F, 9 VF, which is fairly close 

 to the proportions actually found. It will be observed that fleshy 

 progeny are not far less frequent than those of medium build. 



Table 29. — Matings of a slender parent and a very fleshy one, together with their progeny. 



Offspring: A, 36.54 ± 0.59 S. D., 5.51 ± 0.42. 



Before passing to the description of the 13 families based on 

 Eugenics Record Office data, reference may be made to a case described 

 by Rose (1907). A slender man (II 1) of slender parents married a 

 woman who weighed 200 pounds ("livres") and over. Her father 

 weighed 270 pounds and her mother, while not obese, has a goiter. 

 From the primary slender X very fleshy mating were derived 4 chil- 

 dren (fig. 37, III 1 to 5). The first is fleshy; the third slender. The 

 second, a girl, at 16 weighed 150 pounds, but after chlorosis became 

 slenderer. This girl married a man apparently of medium build, and 

 they had 4 children, of whom 3 died of meningitis and the other is 

 an obese infant, weighing 36 pounds at 15 months. The fourth and 

 last of the main fraternity is a girl who, at 15 years, is 145 cm. tall 

 and weighs 75 kg. This gives her an index of build of 3.6 (51), very 



