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The obscure parts of the X chromosome inDrosophila melanogaster

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Abstract

Through the use of small atelic fragments derived from T (1; 4) A,B S the right arm of the X chromosome ofD. melanogaster has been demonstrated.

The proximal portion of XR is a non-chromatic or ghost reversed repeat of the proximal portion of XL.

Polytene X chromosomes show no indications of the limits of the heterochromatic “blocks” which characterize mitotic X chromosomes.

The nuclear organizer is a subterminal portion of the polytene XR, whereas it is situated in XL in mitotic neuroblast cells.

It is suggested that the non-chromatic XR may contain a ghost allele of the genebobbed, and of perhaps other adjacent genes.

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Authors and Affiliations

  1. The Jackson Laboratory, Bar Harbor, Maine, U.S.A.

    A. B. Griffen

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  1. A. B. Griffen
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Additional information

This investigation was supported in part by Contract No. AT (30-1)-2113 from the U.S. Atomic Energy Commission, and in part by Public Health Service Research Grant No. C-4362 from the National Institutes of Health.

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Griffen, A.B. The obscure parts of the X chromosome inDrosophila melanogaster . Genetica 36, 105–113 (1965). https://doi.org/10.1007/BF01557146

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  • DOI: https://doi.org/10.1007/BF01557146

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