- Black sheep
Black sheep is an
English language idiom which describes an odd or disreputable member of a group, especially within one's family. The term has been looked upon either positively or negatively depending on the era and culture in which the term was used.Idiomatic usage
Black sheep is an
English language idiom —usually derogatory—which describes an odd or disreputable member of a group, especially within one's family.cite web |url=http://books.google.com/books?id=9re1vfFh04sC&pg=PA64&lpg=PA64&dq=american+heritage+dictionary+%22black+sheep%22&source=web&ots=JF-Bux9gXr&sig=rAsie-Mb4W-9vB3TZzSbIuVHKLE |title=American Heritage Dictionary of Idioms |accessdate=2007-11-13]The term originated from the occasional black
sheep which are born into a herd of white sheep due to a genetic process ofrecessive trait s. Black sheep were considered commercially undesirable because theirwool cannot be dyed as white wool can. In 18th and 19th century England, the black color of the sheep was seen as the mark of the devil. [cite book|last=Sykes|first=Christopher Simon|title=Black Sheep|publisher=Viking Press |location=New York|date=1983|page=11|isbn=0670172766]In modern usage, the expression has lost some of its negative connotations, and the term is usually given to the member of a group who has certain characteristics deemed inappropriate by that group.cite book|title=The American Heritage® Dictionary of Idioms|publisher=Houghton Mifflin Company|year=1992|Answers.com 01 Apr. 2008|url=http://www.answers.com/topic/black-sheep|accessdate=2008-03-24]
Biological origin
In sheep, whiteness is not
albinism but a dominant gene that actively switches color production off. As a result, sheep blackness isrecessive , and if a white ram and a white ewe are parents of a black lamb, both must beheterozygous for black, and then there is a 25% chance that the lamb will be black. A recent study done by the [http://www.umb.no Agricultural University of Norway] , and [http://www.ohsu.edu/vollum/ The Vollum Institute of the Oregon Health Sciences University] believe the black color is created by anallele E D at the extension locus. [cite journal| coauthors = Dag Inge Våge, Helge Klungland, Dongsi Lu and Roger D. Cone|title=Molecular and pharmacological characterization of dominant black coat color in sheep|journal=Mammalian Genome|volume=10|issue=1|pages=39–43|publisher=Springer New York|date=January, 1999|url=http://www.springerlink.com/content/h800bru487qmhtck/|doi=110.1007/s003359900939|issn=0938-8990 (Print) 1432-1777 (Online)| accessdate=2008-03-31]Other uses
In
psychology , the "black sheep effect" refers to the tendency of an in-group to treat or evaluate a member of its own more harshly than a similarly negative behavior or deed of an out-group member. [ [http://www.psychology-lexicon.com/lexikon/black-sheep_effect.htm Black sheep effect] Psychology Lexicon. Retrieved onJanuary 4 2008 ]ee also
*
The Ugly Duckling
*Scapegoat
*Albino Black Sheep References
External links
* [http://www.imablacksheep.com] A home on the Internet for Black Sheep and their families
*cite journal
last =
first =
authorlink =
coauthors = José M. Marques, Vincent Y. Yzerbyt
title = The black sheep effect: Judgmental extremity towards ingroup members in inter-and intra-group situations
journal = European Journal of Social Psychology
volume = 18
issue = 3
pages = 287–292
publisher = Science Direct
location =
date =
url = http://www.sciencedirect.com/science/journal/00221031
doi = 10.1002/ejsp.2420180308
id =
accessdate = 2008-01-04
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