Medical term:

discordance


discordance

 [dis-kor´dans]
the occurrence of a given trait in only one member of a twin pair. adj., adj discor´dant.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

dis·cor·dance

(dis-kōr'dăns),
1. Dissociation of two characteristics in the members of a sample from a population; used as a measure of dependence.
2. In genetics, the presence of a given trait in only one member of a twin pair. Compare: concordance.
Farlex Partner Medical Dictionary © Farlex 2012

discordance

(dĭ-skôr′dns)
n.
1. The state or an instance of disagreement; discord.
2. Genetics The presence of a given trait in only one member of a pair of identical twins.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

dis·cor·dance

(dis-kōr'dăns)
Dissociation of two characteristics in the members of a sample from a population; used as a measure of dependence.
Compare: concordance
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

discordance

Difference of phenotype in two individuals of identical, or near-identical, genotype.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

discordance

any difference in a character between individuals due to genetic differences, as may occur in DIZYGOTIC TWINS, but not usually in MONOZYGOTIC TWINS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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