(redirected from testcrossed)
Also found in: Thesaurus, Medical.


 (tĕst′krôs′, -krŏs′)
A cross between an individual exhibiting the dominant phenotype of a trait and an individual that is homozygous recessive for that trait in order to determine the genotype of the dominant individual.
tr.v. test·crossed, test·cross·ing, test·cross·es
To subject to a testcross.


(ˈtɛstˌkrɒs) genetics
(Genetics) a genetic test for ascertaining whether an individual is homozygous or heterozygous
vb (tr)
(Genetics) to subject to a testcross


(ˈtɛstˌkrɔs, -ˌkrɒs)

a genetic test for heterozygosity in which an organism of dominant phenotype, but unknown genotype, is crossed with an organism recessive for all markers in question.
test′-cross`, v.t.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.testcross - a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring
hybridisation, hybridization, hybridizing, interbreeding, crossbreeding, crossing, cross - (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids
References in periodicals archive ?
In both cases, the trihybrid virgin females are testcrossed to ([y.
2], plants with 14" were selected and testcrossed to Langdon double-ditelosomic 1A to identify plants carrying a 1A.
These F1 flies were either mated together to produce dihybrid F2 data or were testcrossed to produce dihybrid testcross data.
In summer 2002 at Saint Paul, So plants from each population were testcrossed (as female parents) to BSSS inbred LH295 (male parent) in an isolated field.
2] lines testcrossed to LH198 and individual ear selection through the [S.
2] progenies that produced testcrosses in the top 10% for yield in the 1999 trials were selected and testcrossed to two non-BSSS proprietary inbreds (Golden Harvest IN504 and IN354) during the winter season of 2000-2001.
Pioneer Hi-bred, Forage Genetics, Hungarian, Innovator +Z), the population mean was estimated as the average of the within population genotypes (Table 1) testcrossed to the whole population.
1] from G7-5 x T586 was testcrossed as female with a normal nonrestoring genotype, H1330 (Bourland, 1996), while the [F.