backcross(redirected from double backcross)
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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.
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.
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.
1. The act of making such a cross.
2. An individual resulting from such a cross.
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.
Mating of an individual heterozygous at one or more loci to an individual homozygous at the same loci.
backcrossa 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.
mating the crossbred offspring of a two-way cross back to one of the parent breeds.