Dosage of the Maternal Effect Gene Associated with the Tumorous-Head Abnormality in DROSOPHILA MELANOGASTER |
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Authors: | R. M. Siervogel |
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Affiliation: | Department of Zoology, Arizona State University, Tempe, Arizona 85281 |
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Abstract: | The penetrance of tuh-3 observed in the progeny of triploids with two doses of tuh-1 was not statistically different from that occurring in the progeny of their diploid sisters with two doses. A higher penetrance was observed in the progeny of triploids with three doses of tuh-1 than in the progeny of their diploid sisters with two doses. These observations suggest that the maternal effect responsible for increasing the penetrance of tuh-3, the gene causing the tumorous-head abnormality, is caused by a specific gene product of tuh-1, the maternal-effect allele. In addition there is probably a maternal-effect threshold, lying between amounts produced by one and two doses of tuh-1, below which no increased penetrance of tuh-3 is observed. |
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