Silkie the "SHH" gene, called the ZPA Regulatory Sequence (ZRS). This causes ectopic "SHH" expression in the anterior of the developing limb bud, leading to increased tissue growth and digits. While the feet of the Silkie display polydactyly, the wings have the standard tridactyly (three digit) arrangement. The Japanese Silkie initially develops additional digits in the wing as an embryo, but these are lost prior to hatching. The genetic cause behind Silkie polydactyly differs from those that cause polydactyly in the Dorking chicken breed, which is due to ectopic "FGF4" expression in the AER, with ectopic "SHH" a secondary effect. The
The Blue Bird (fairy tale) The Blue Bird (fairy tale) "The Blue Bird" is a French literary fairy tale by Madame d'Aulnoy, published in 1697. An English translation was included in "The Green Fairy Book", 1892, collected by Andrew Lang. The tale is Aarne–Thompson type 432, The Prince as Bird. Others of this type include "The Feather of Finist the Falcon", "The Green Knight", and "The Greenish Bird". After a wealthy king loses his dear wife, he meets and falls in love with a woman, who is also recently widowed and they marry. The king has a daughter named Florine and the queen also has