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The meaning of TESTCROSS is a genetic cross between a homozygous recessive individual and a corresponding suspected heterozygote to determine the genotype of the latter.
The test cross is an experiment first employed by Gregor Mendel, in his studies of the genetics of traits in pea plants. Mendel’s theory, which holds true today, was that each organism carried two copies of each trait. One was dominant trait, while one could be considered recessive.
A test cross involves crossing an individual organism with a dominant genotype or phenotype with another organism exhibiting a recessive genotype or phenotype. To better grasp the concept of test crossing, let's explore various types of crosses involving one or more genes of interest.
Test Cross Definition. A test cross is a genetic method for determining the unknown genotype of a dominant individual. It is a breeding method between a (known genotype) homozygous recessive individual with an individual of the opposite mating type with an unknown dominant genotype.
In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and...
testcross, the mating of an organism whose genetic constitution is unknown with an organism whose entire genetic makeup for a trait is known, to determine which genes are carried by the former.
A test cross is a way to explore the genotpye of an organism. Early use of the test cross was as an experimental mating test used to determine what alleles are present in the...
Testcross definition: a genetic test for heterozygosity in which an organism of dominant phenotype, but unknown genotype, is crossed to an organism recessive for all markers in question.. See examples of TESTCROSS used in a sentence.
What Is A Test Cross? A test cross is commonly used to find out the genotype of a heterozygous organism showing a dominant character by crossing it with a pure-breeding recessive organism. The reason for carrying out a test cross is to determine if the dominant organism is homozygous or heterozygous for that particular trait.
noun. 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. synonyms: test-cross. see more.