
An allosome is a sex chromosome that differs from an ordinary autosome in form, size, and behavior. The human sex chromosomes are a typical pair of allosomes. These chromosomes determine the sex of an individual when reproducing. Allosomes are also referred to as sex chromosomes or idiosomes. Autosomes differ from allosomes because autosomes appea...
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http://en.wikipedia.org/wiki/Allosome

<genetics> One or more chromosomes that can be distinguished from autosomes by their morphology and behaviour. ... Synonym: accessory chromosome, heterochromosome, sex chromosome. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

Type: Term Pronunciation: al′ō-sōm Definitions: 1. Obsolete term for one of the chromosomes differing in appearance or behavior from the autosomes and sometimes unequally distributed among the germ cells.
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http://www.medilexicon.com/medicaldictionary.php?t=2388

allosome Any chromosome or chromosome fragment other than a normal A-chromosome.
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http://www.wordinfo.info/words/index/info/view_unit/84/9
No exact match found.