Bauhaus-Universität Weimar

"behaviour than perhaps any other common qualities. 
Parents of different Statures usually transmit a blended 
heritage to their children, but parents of different Eye- 
colours usually transmit an alternative heritage. If one 
parent is as much taller than the average of his or her 
sex as the other parent is shorter, the Statures of their 
children will be distributed, as we have already seen, in 
nearly the same way as if the parents had both been 
of medium height. But if one parent has a light Eye- 
colour and the other a dark Eye-colour, some of the 
children will, as a rule, be light and the rest dark ; they 
will seldom be medium eye-coloured, like the children 
of medium eye-coloured parents. The blending in 
Stature is due to its being the aggregate of the quasi¬ 
independent inheritances of many separate parts, while 
Eye-colour appears to be much less various in its 
origin. If notwithstanding this two-fold difference 
between the qualities of Stature and Eye-colour, the 
shares of hereditary contribution from the various 
ancestors are alike in the two cases, as I shall show that 
they are, we may with some confidence expect that the 
law by which those hereditary contributions are found 
to be governed, may be widely, and perhaps universally 
Data.—My data for hereditary Eye-colour are drawn 
from the same collection of “Records of Family 
Faculties ” (“ R.F.F.”) as those upon which the inquiries 
into hereditary Stature were principally based. I have 
analysed the general value of these data in respect to


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