backcross

[bak-kraws, -kros] Genetics.
verb (used with object)
1.
to cross (a hybrid of the first generation) with either of its parents.
noun
2.
an instance of such crossing.

Origin:
1900–05; back2 + cross

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Collins
World English Dictionary
backcross (ˈbækˌkrɒs)
 
vb
1.  to mate (a hybrid of the first generation) with one of its parents
 
n
2.  the offspring so produced
3.  the act or process of backcrossing

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

backcross back·cross (bāk'krôs')
v. back·crossed, back·cross·ing, back·cross·es
To cross a hybrid with one of its parents, or with an individual genetically identical to one of its parents. n.

  1. The act of making such a cross.

  2. An individual resulting from such a cross.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
backcross   (bāk'krôs', -krŏs')  Pronunciation Key 
Verb   To cross a hybrid with one of its parents or with an individual genetically identical to one of its parents. Backcrossing is used in research to isolate genetic characteristics found in one of the parents.

Noun  
  1. The act of making such a cross.

  2. An individual resulting from such a cross.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

backcross

the mating of a hybrid organism (offspring of genetically unlike parents) with one of its parents or with an organism genetically similar to the parent. The backcross is useful in genetics studies for isolating (separating out) certain characteristics in a related group of animals or plants. In animal breeding, a backcross is often called a topcross. Grading usually refers to the mating of average, or "grade," females to a superior male, then backcrossing the female offspring to the same or a similar sire.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The other approach is through the more difficult backcross method.
Only then did teosinte backcross with its wild corn parent, he argued, leading to modern corn.
Linkage mapping of domestication loci in a large maize-teosinte backcross resource.
Recently scientists have found promise in a method called backcross breeding.
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