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A selective method for studying primary sex chromosome non-disjunction in females and males and X-Y exchange in males of Drosophila melanogaster including a demonstration of euchromatic X-Y exchange

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Abstract

A selective method was developed, based on negative complementation of the Abruptex alleles of the Notch focus, for studying primary sex chromosome non-disjunction in females and males of Drosophila melanogaster and X-Y exchange in males. The results show that the frequency of primary non-disjunction of structurally normal X chromosomes was lower than the frequency of X-derY non-disjunction in males. Double exchange between the X and the derY chromosome in the male occurs with a frequency of at least 0.091%. Single exchanges are naturally expected to occur with even higher frequency. Exchanges were interestingly at least partly of cuchromatic nature. The origin of these exchanges is at least partly of gonial origin.

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  1. Laboratory of Genetics, Department of Biology, University of Turku, SF-20500, Turku, Finland

    P. Portin & M. Rantanen

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  1. P. Portin
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  2. M. Rantanen
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Portin, P., Rantanen, M. A selective method for studying primary sex chromosome non-disjunction in females and males and X-Y exchange in males of Drosophila melanogaster including a demonstration of euchromatic X-Y exchange. Genetica 85, 147–151 (1992). https://doi.org/10.1007/BF00120321

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  • DOI: https://doi.org/10.1007/BF00120321

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