Abstract
Although the two are rather similar in absolute size, the avian Z-chromosome makes up nearly 10% of the genome, while the original X of placental mammals comprises only 5%. It would appear that birds have an even greater need than mammals for developing an effective dosage compensation mechanism for their Z-linked genes. It is a great surprise to find that avian species apparently failed in developing an effective means for achieving the dosage compensation.
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Ohno, S. (1966). Apparent Absence of Dosage Compensation for Z-linked Genes of Avian Species. In: Sex Chromosomes and Sex-Linked Genes. Monographs on Endocrinology, vol 1. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-88178-7_13
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DOI: https://doi.org/10.1007/978-3-642-88178-7_13
Publisher Name: Springer, Berlin, Heidelberg
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