Summary
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1.
Pupae and mature larvae of the blow-fly (Calliphora erythrocephala) will continue to develop slowly at a temperature of 4°C.
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2.
White-eyed mutant females which emerge from pupae subjected to the low temperature have, at emergence, eyes of a deeper yellow colour than mutant females newly emerged from pupae which have developed at 21°C.
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3.
Some flies of the white-eyed mutant strain emerged after 6 months while still in the refrigerator at 4°C. These mutant females had red pigment granules deposited in the secondary pigment cells and probably also in the primary pigment cells. Red pigment granules are never formed in white-eyed mutant aemales which emerge from pupae kept at 21°C.
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References
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Tate, P. The effect of cold upon the development of pigment in a white-eyed mutant form of the blow-fly (Calliphora erythrocephala). Journ. of Genetics 48, 192–193 (1947). https://doi.org/10.1007/BF02989379
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DOI: https://doi.org/10.1007/BF02989379