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"Breeds Apart: Purebred purebred

progeny derived from at least several generations of animals of the same breed.


purebred herds
herds (or flocks) composed of purebred animals. Not necessarily registered animals. Distinct from crossbred herds.
 dogs defined by DNA DNA: see nucleic acid.
DNA
 or deoxyribonucleic acid

One of two types of nucleic acid (the other is RNA); a complex organic compound found in all living cells and many viruses. It is the chemical substance of genes.
 differences" (SN: 5/22/04, p. 324) failed to include in the list of oldest dogs the Shiba Inu Shiba Inu

the smallest (20-30 lb) of the Japanese native dogs, it was bred as a hunting dog. A medium-sized, muscular dog with a thick coat in all solid colors but often red. See also nippon inu.
. This is the most popular dog in Japan today, and many of its qualities make it a much better pet than the other dogs listed in your "oldest breeds" category.

DEBORAH KATE HUNT, MADISON, WIS.

The genetic analysis included the Shiba Inu, and the dog indeed falls into the oldest-breeds category.--J. TRAVIS
COPYRIGHT 2004 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2004, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Article Details
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Title Annotation:Letters
Author:Hunt, Deborah Katz
Publication:Science News
Article Type:Letter to the Editor
Date:Aug 7, 2004
Words:79
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