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The genetics of the Xasta mutant of Drosophila melanogaster

  • C. M. Hetherington (a1), W. J. Whittington (a1), M. A. Hossain (a1) and W. E. Peat (a1)

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Xasta flies appear to segregate five types of gametes in unequal numbers, namely two which contain both or neither of the chromosomes affected by the translocation and inversions, two further classes which contain one affected and one unaffected chromosome, and finally the remainder which have an unbalanced chromosomal content. These conditions are necessary to fit the results observed in crosses involving the Xasta stock. Xasta exhibits balanced polymorphism under crowded conditions and this may be due to the production of toxic substances by Xa larvae which delay the development of wild type-larvae.

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References

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