Variation of Animals and Plants under Domestication, the — Volume 2 by Charles Darwin
page 55 of 776 (07%)
page 55 of 776 (07%)
![]() | ![]() |
|
individuals, races, and species, are prepotent in transmitting their likeness.
This subject has been ably discussed by Prosper Lucas (14/2. 'Hered. Nat.' tome 2 pages 112-120.), but is rendered extremely complex by the prepotency sometimes running equally in both sexes, and sometimes more strongly in one sex than in the other; it is likewise complicated by the presence of secondary sexual characters, which render the comparison of crossed breeds with their parents difficult. It would appear that in certain families some one ancestor, and after him others in the same family, have had great power in transmitting their likeness through the male line; for we cannot otherwise understand how the same features should so often be transmitted after marriages with many females, as in the case of the Austrian Emperors; and so it was, according to Niebuhr, with the mental qualities of certain Roman families. (14/3. Sir H. Holland 'Chapters on Mental Physiology' 1852 page 234.) The famous bull Favourite is believed (14/4. 'Gardener's Chronicle' 1860 page 270.) to have had a prepotent influence on the shorthorn race. It has also been observed (14/5. Mr. N.H. Smith 'Observations on Breeding' quoted in 'Encyclop. of Rural Sports' page 278.) with English racehorses that certain mares have generally transmitted their own character, whilst other mares of equally pure blood have allowed the character of the sire to prevail. A famous black greyhound, Bedlamite, as I hear from Mr. C.M. Brown "invariably got all his puppies black, no matter what was the colour of the bitch;" but then Bedlamite "had a preponderance of black in his blood, both on the sire and dam side." [The truth of the principle of prepotency comes out more clearly when distinct races are crossed. The improved Shorthorns, notwithstanding that the breed is comparatively modern, are generally acknowledged to possess great power in impressing their likeness on all other breeds; and it is chiefly in consequence of this power that they are so highly valued for exportation. |
|