Full text: Problems in eugenics

Exhibit K i—2. 
which the external narial apertures are lodged; second, the marked 
convexity of the contour of the bridge ; third, the well-defined or 
sharp angularity of the general form. Her son’s nose differs from 
hers in all three of these points. His wife’s nose is of the more 
rounded type and differs very widely from that of the gipsy grand­ 
mother (her mother-in-law). The three girl children of these two 
parents clearly do not possess a nose like that of their grandmother. 
The two younger daughters appear to resemble their mother, while 
the oldest appears to be an intermediate between her mother and 
father. So far then there is no feature of any special interest. 
But it is otherwise when we come to deal with the nose of the 
son (grandson of the old gipsy woman). For it resembles hers in 
all three of the marked features which give to her nose its distinctive 
and prominent form. The convexity of the bridge is, perhaps, not 
quite so pronounced, but then he is still young, and this is a feature 
likely to become accentuated with age. 
Two features of Mendelian interest are shown in this group 
of a grandmother, two parents and four grandchildren. First, 
there is a hereditary transmission of nose type from grandmother to 
grandson. Second, there is a clean segregation of the nose type 
manifested by the brother, from the contrasted nose type or types 
exemplified by his three sisters. In addition, the case is interesting 
since it manifests segregation of characters in the offspring of parents 
of different races, i.e., a gipsy and a native of the West of England. 
In the absence of precise information concerning the form of 
nose of the gipsy grandmother’s husband, and of their five other 
children, and of the brothers and sisters of the grandmother, it is 
difficult to formulate a scheme showing a definite Mendelian inherit­ 
ance in this case. But the two features alluded to in the preceding 
paragraph are strongly suggestive of inheritance according to 
Mendelian principles. 
We are indebted to Mrs. Rose Haig Thomas for the general facts 
of this case and for the photograph of the group. 
A few years ago I had an opportunity of meeting two friends K 2 
who had spent many years in different parts of Canada and were 
acquainted with families who were derived from an ancestry partly 
European and partly North American Indian. I gathered from my 
friends, in virtue of much kindness and patience upon their part, 
some valuable facts concerning the nature of various facial features 
in the offspring of the two mixed races—European and Red Indian. 
I purpose here to deal with two families and with only one character,

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