The Responding Site of the Rex Locus of Drosophila melanogaster | Zendy

Ellen E Swanson | Zendy

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The Responding Site of the Rex Locus of Drosophila melanogaster

Author(s) -

Ellen E Swanson

Publication year - 1987

Publication title -

genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.792

H-Index - 246

eISSN - 1943-2631

pISSN - 0016-6731

DOI - 10.1093/genetics/115.2.271

Subject(s) - heterochromatin , biology , locus (genetics) , drosophila melanogaster , genetics , gene , mitosis , heterochromatin protein 1 , chromosome

Rex is a dominant, maternal-effect locus in the heterochromatin of the X chromosome Drosophila melanogaster. It causes an early mitotic exchange-like event between heterochromatic elements of an attached- XY in X/attached-XY embryos of Rex mothers. Evidence is presented here that the site of Rex action is the ribosomal RNA gene cluster (the bb locus) only; no other heterochromatin is affected. The Rex locus may be useful in studying regulation of rRNA-gene copy number, mitotic chromosome behavior and heterochromatic function.

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