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late-replicating X chromosome


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In the mammalian somatic cell nucleus, all X chromosomes but one coil up into a condensed mass (the Barr body or sex chromatin body) and do not function in transcription. Such X chromosomes complete their replication later than the functional X and the autosomes. See Barr body, Lyon hypothesis, sex chromatin.

Subjects: Genetics and Genomics.


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