An analysis of the development of conjunctival papillae and scleral ossicles in the eye of the scaleless mutant,

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Abstract
An analysis was carried out on the number and location of conjunctival papillae and scleral ossicles in chick embryos homozygous for the recessive gene scaleless. There are, on the average, three conjunctival papillae per eye in the mutant, while normal embryos have 14. The mutant is also deficient in the number of scleral ossicles having an average of one ossicle per eye. The ossicles of scaleless mutants in contrast to normals, are variable in size and irregular in shape. They are found in the same region as the papillae which remain after nine days of incubation. Histological examinations indicate a general retardation of the scaleless conjunctival papillae.