| 释义 |
testcross
test·cross T0126200 (tĕst′krôs′, -krŏs′)n. 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.testcross (ˈtɛstˌkrɒs) geneticsn (Genetics) a genetic test for ascertaining whether an individual is homozygous or heterozygousvb (tr) (Genetics) to subject to a testcrosstest•cross (ˈtɛstˌkrɔs, -ˌkrɒs)
n. 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. [1930–35] test′-cross`, v.t. Thesaurus| Noun | 1. | 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 offspringtest-crosshybridisation, hybridization, hybridizing, interbreeding, crossbreeding, crossing, cross - (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids |
testcross
test·cross (test'kros), Crossing of an unknown genotype to a recessive homozygote so that the phenotype of the progeny corresponds directly to the chromosomes carried by the parents of unknown genotype. Synonym(s): backcross (2) testcross (tĕst′krôs′, -krŏs′)n. 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·crossing, test·crosses To subject to a testcross. Fig. 295 Testcross. A testcross to find the genotype of the unknown parent. testcross a cross in which one partner is homozygous (see HOMOZYGOTE for the recessive alleles of the genes being investigated. The testcross progeny will indicate the GENOTYPE of the unknown parent. See Fig. 295 . Test crosses are used extensively in experiments to establish GENETIC LINKAGE. See also BACKCROSS.testcross
Related to testcross: incomplete dominanceSynonyms for testcrossnoun 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 offspringSynonymsRelated Words- hybridisation
- hybridization
- hybridizing
- interbreeding
- crossbreeding
- crossing
- cross
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