Carnegie Institution of Washington publication no. 285

Carnegie Institution of Washington publication no. 285

The genetic and the operative evidence relating to secondary sexual charactersThere are a few races of poultry...
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Author: Morgan, Thomas Hunt,1866-1945
Format: eBook
Language: English
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Carnegie Institution of Washington publication no. 285

Carnegie Institution of Washington publication no. 285

¥2,151 ¥1,075

Carnegie Institution of Washington publication no. 285

¥2,151 ¥1,075
Author: Morgan, Thomas Hunt,1866-1945
Format: eBook
Language: English

The genetic and the operative evidence relating to secondary sexual characters

There are a few races of poultry that have two kinds of males, one with the feathering of the ordinary cock, the other with the feathering of the hen. The Hamburgs and the Campines are perhaps the best known races of this sort. Convention amongst breeders, in certain countries, has determined that the cock-feathered bird shall be the standard, and at other times and places that the hen-feathered males shall be the show birds. In one breed, at least, viz., the Sebright bantams, the hen-feathered cock is the only known type. Cock-feathered Sebrights have never been seen, so far as I know. This breed is pure for hen-feathering. As shown in plate 1, figure 3, the male Sebright lacks the long, pointed saddle feathers at the base of the tail of the common cock, also the peculiar back and neck feathers (hackles) of the cock bird, as well as the male feathering on the bow of the wing. His feathers in these parts are almost exactly like those of the hen (plate 4, fig. 4). The long sickle feathers covering the true tail are also absent, although the two median ones sometimes occur in males of this race. ......Buy Now (To Read More)

Product details

Ebook Number: 57460
Author: Morgan, Thomas Hunt
Release Date: Jul 7, 2018
Format: eBook
Language: English

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