TWO NEW EYE COLORS IN THE THIRD CHROMOSOME OF DROSOPHILA MELANOGASTER

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Abstract
In a series of temperature experiments, during which cultures of Drosophila melanogaster were incubated, many new variations appeared. Only one, scarlet eye color, similar in appearance to "vermilion" of the first chromosome group, was found to be a true mutation. Scarlet is a third chromosome character whose gene is on the sepia side of dichæte at a locus of 3.2 from the latter. The same eye color has arisen as an independent mutation at Columbia University in the cultures of D. E. Lancefield, whose paper is also in this journal. When crossed, the two strains give F1 like the parents. Rose, an eye color appearing in another stock, is the third of a series of allelomorphs. It occupies the same locus on the third chromosome as do pink and peach. Rose is identical in appearance with salmon, a new sex linked mutant found by Dr. F. Payne. This case furnishes another example of different genes producing the same phenotype.

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