testcross
Hello, you have come here looking for the meaning of the word testcross. In DICTIOUS you will not only get to know all the dictionary meanings for the word testcross, but we will also tell you about its etymology, its characteristics and you will know how to say testcross in singular and plural. Everything you need to know about the word testcross you have here. The definition of the word testcross will help you to be more precise and correct when speaking or writing your texts. Knowing the definition oftestcross, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.
English
Alternative forms
Etymology
Pronunciation
Noun
testcross (plural testcrosses)
- (genetics) The breeding of an individual with a phenotypically recessive individual, in order to determine the zygosity of the former by analysing proportions of offspring phenotypes.
- 1967, W. A. Russell, A. H. Teich, Selection in Zea Mays L. by Inbred Line Appearance and Testcross Performance in Low and High Plant Densities:
- The inbreds of groups 3 and 4 have a distinct difference in plant height, except for a few selections, presumably because of some difference in selection pressure at low- and high-stand densities. Group means for testcross performance showed more progress in group 4 than in group 3 because of a difference in the number of low-yielding genotypes in the two groups.
- 2012, Benjamin A. Pierce, Genetics: A Conceptual Approach, Macmillan, →ISBN, page 55:
- You could determine its genotype by performing a testcross. If the plant were homozygous (TT), a testcross would produce all tall progeny (TT × tt → all Tt); if the plant were heterozygous (Tt), half of the progeny would be tall and half would be short (Tt × tt → 1/2 Tt and 1/2 tt). When a testcross is performed, any recessive allele in the unknown genotype is expressed in the progeny, because it will be paired with a recessive allele from the homozygous recessive parent.
Verb
testcross (third-person singular simple present testcrosses, present participle testcrossing, simple past and past participle testcrossed)
- (genetics) To breed an individual in this manner.