alexa X Chromosome and Autosome Dosage Responses in Drosophila melanogaster Heads.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Down Syndrome & Chromosome Abnormalities

Author(s): Chen ZX, Oliver B

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Abstract

X chromosome dosage compensation is required for male viability in Drosophila. Dosage compensation relative to autosomes is two-fold, but this is likely to be due to a combination of homeostatic gene-by-gene regulation and chromosome-wide regulation. We have baseline values for gene-by-gene dosage compensation on autosomes, but not for the X chromosome. Given the evolutionary history of sex chromosomes, these baseline values could differ. We used a series of deficiencies on the X and autosomes, along with mutations in the sex-determination gene transformer-2, to carefully measure the sex-independent X-chromosome response to gene dosage in adult heads by RNA sequencing. We observed modest and indistinguishable dosage compensation for both X chromosome and autosome genes, suggesting that the X chromosome is neither inherently more robust nor sensitive to dosage change.

This article was published in G3 (Bethesda) and referenced in Journal of Down Syndrome & Chromosome Abnormalities

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