backcross

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backcross

 [bak´cros″]
in experimental genetics, union between a heterozygote of the first generation and one of its parents or an organism genetically identical to one of its parents.
double backcross the mating between a double heterozygote and a homozygote.

back·cross

(bak'kros),
1. The mating between an animal that is homozygous at a locus of interest and an animal that is heterozygous, commonly from the same ancestral stock.
2. Synonym(s): testcross

backcross

/back·cross/ (bak´kros) a mating between a heterozygote and a homozygote.

backcross

(băk′krôs′, -krŏs′)
tr.v. back·crossed, back·crossing, back·crosses
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.

backcross

Etymology: AS, baec + cruc, cross
1 a mating (cross) between a heterozygote and a homozygote.
2 an organism or strain produced by such a cross. See also testcross.

back·cross

(bak'kraws)
Mating of an individual heterozygous at one or more loci to an individual homozygous at the same loci.
Backcrossclick for a larger image
Fig. 59 Backcross . Results from different parental types.

backcross

a genetical term describing a mating between a HYBRID organism and one of the original parental types. The results of a backcross depend upon the parental type.

A backcross to the recessive parental is diagnostic (since it reveals the genotype of the hybrid) and is called a TESTCROSS.

backcross

mating the crossbred offspring of a two-way cross back to one of the parent breeds.
References in periodicals archive ?
University geneticist John Carman, ARS plant physiologist Jerry Chatterton, and geneticist Richard Wang have crossed the Australian wheatgrass with cultivated wheat and are now making backcrosses.
These two species introgress extensively and many different crosses and backcrosses can be found in the central regions.
The three fish initially identified as hybrids were confirmed by electrophoresis (two backcrosses to walleye and one [F.
Researchers will begin third backcrosses this year and are only one cross away from the end of their breeding program (about seven years).
As backcrosses to JNC were the daughters of G1 cows, the better performance of BCBK compared with JNC calves during the pre-weaning period could be the result of better maternal ability and higher milk production of crossbred cows compared with JNC cows.
gambelii) quail overlap and hybrids or backcrosses compose approximately 60% of the population (Gee 2003).