Patterns of replication in the neo-sex chromosomes of Drosophila nasuta albomicans

Mahesh, G. and Ramachandra, N. B. and Ranganath, H. A. (2000) Patterns of replication in the neo-sex chromosomes of Drosophila nasuta albomicans. Journal of Biosciences, 25 (3). pp. 229-234. ISSN 0250-5991

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Abstract

Drosophila nasuta albomicans (with 2n = 6), contains a pair of metacentric neo-sex chromosomes. Phylogenetically these are products, of centric fusion between ancestral sex (X, Y) chromosomes and an autosome (chromosome 3). The polytene chromosome complement of males with a neo-X- and neo-Y-chromosomes has revealed asynchrony in replication between the two arms of the neo-sex chromosomes. The arm which represents the ancestral X-chromosome is faster replicating than the arm which represents ancestral autosome. The latter arm of the neo-sex chromosome is synchronous with other autosomes of the complement. We conclude that one arm of the neo-X/Y is still mimicking the features of an autosome while the other arm has the features of a classical X/Y-chromosome, This X-autosome translocation differs from the other evolutionary X-autosome translocations known in certain species of Drosophila.

Item Type:	Article
Uncontrolled Keywords:	centric fusion; Drosophila albomicans; neo-sex chromosomes; replication pattern
Subjects:	B Life Science > Zoology
Divisions:	Department of > Zoology
Depositing User:	Users 19 not found.
Date Deposited:	23 Sep 2019 05:51
Last Modified:	23 Sep 2019 05:51
URI:	http://eprints.uni-mysore.ac.in/id/eprint/8348

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