Full text: Problems in eugenics

64Exhibit K 2B—3. 
Princess, namely, a daughter of a Chief. She had one only daughter 
(Generation B, 2) whose nose was of the Indian type, but rather flat. 
The daughter married an Irishman (Generation B, 1), and they 
had six children. Of these three had European types of nose and 
three the Indian type (Generation C, 1-6). 
This family shows again an apparently clean segregation of 
Indian and European types of nose. The two types appear, side by 
side, in different individuals of the same fraternity. 
THE SEGREGATION OF RACIAL EYE-COLOUR. 
By Geo. P. Mudge. 
It is a matter of importance to know the exact influence which 
a mixture of races exerts upon the hereditary transmission of char­ 
acters. For instance, do the alternative characters of two races of 
men, when they are related by marriage, segregate in inheritance in 
accordance with Mendelian principles? Is the term “blending or 
fusion of races misleading, and only accurate when employed in a 
qualified sense ” ? 
It has been shown by Mr. Hurst’s very careful investigations in 
a Leicestershire village that certain types of human eye-colour, which 
he designates as “ Simplex” and “ Duplex,” are inherited in com­ 
plete accord with Mendelian principles of inheritance. The two 
types not only segregate from each other in the course of transmis­ 
sion, but they do so in practically exact Mendelian proportions. And 
the “ Simplex ” type, which is the recessive form of eye-colour, breeds 
true. It begets nothing but the Simplex eye. These results have been 
confirmed by Professor and Mrs. Davenport in America. In this 
and similar cases we are merely dealing with the transmission of 
alternative characters in individuals of the same race.* 
But one of the interesting problems of the future is concerned 
with the transmission of characters when human races of diverse 
characteristics breed together. We are not concerned to discuss now 
whether the races of mankind are varieties or species. 
SPANIARD V. GIPSY. 
The records of travellers provide certain information which helps 
us to form reliable though limited conclusions as to the results of the 
inter-breeding of different human races. Mrs. Rose Haig Thomas, 
* Of course, the “ English ” race is really a community of many commingled 
races. But from our present standpoint that matters little. It is rather con­ 
firmatory of the further facts and conclusions I am about to describe.
	        

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