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

✍ Scribed by Palmoski, M. J. ;Goetinck, P. F.

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
656 KB
Volume
174
Category
Article
ISSN
0022-104X

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✦ Synopsis

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.

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## Abstract The scutate scales are entirely missing in chick embryos homozygous for the gene, β€œscaleless.” Reticulate scales of this mutant are present; however, they have undergone abnormal morphogenesis into irregular mounds and crevices. The pattern of keratinization seen along the anterior meta