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The Effect of the Lozenge Pseudoallelic Series on Eye Pigmentation in Drosophila Melanogaster. II. Red Pigment and Pigmentation in Lozenge Compounds



The Effect of the Lozenge Pseudoallelic Series on Eye Pigmentation in Drosophila Melanogaster. II. Red Pigment and Pigmentation in Lozenge Compounds



Genetics 43(2): 261-273



The quantity and distribution of red pigment in the eyes of 10 lozenge pseudoalleles homozygous for either scarlet (st) or vermilion (v) were determined and the red pigmentation in 18 compounds formed from lozenge alleles homozygous for st was analyzed. The differences in eye color between the lozenge mutants were the result of variations in the amount of red pigment produced and the distribution of the pigment in the ommatidia. The distribution appears to be directly associated with the abnormalities in structure and arrangement of the ommatidial cells. Irregular cell differentiation during pupal development, which results in abnormal ommatidia, secondarily results in abnormal pigmentation of the eyes. Variations in pigmentation in compounds between lozenge mutants did not always correspond to the structural abnormalities present in the eyes of the heterozygotes. The correlation between structural irregularities and abnormalities in pigmentation does not completely account for the variations in phenotypic expression of the various lozenge pseudoalleles.

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Accession: 033785661

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PMID: 17247755



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