"testcross" meaning in English

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  "etymology_text": "From test + cross.",
  "forms": [
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      "form": "testcrosses",
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        {
          "ref": "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:",
          "text": "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.",
          "type": "quote"
        },
        {
          "ref": "2012, Benjamin A. Pierce, Genetics: A Conceptual Approach, Macmillan, →ISBN, page 55:",
          "text": "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.",
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        "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."
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        [
          "recessive",
          "recessive"
        ],
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          "zygosity",
          "zygosity"
        ],
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          "phenotype",
          "phenotype"
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        "(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."
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      "ipa": "/ˈtɛstˌkɹɒs/"
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      "word": "test cross"
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  "wikipedia": [
    "Test cross"
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  "word": "testcross"
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  "etymology_text": "From test + cross.",
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      "form": "testcrossing",
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      "form": "testcrossed",
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        "(genetics) To breed an individual in this manner."
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    "Test cross"
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          "text": "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.",
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        {
          "ref": "2012, Benjamin A. Pierce, Genetics: A Conceptual Approach, Macmillan, →ISBN, page 55:",
          "text": "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.",
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        "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."
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          "recessive",
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        "(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."
      ],
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        "medicine",
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  "synonyms": [
    {
      "word": "test cross"
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  ],
  "wikipedia": [
    "Test cross"
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  "word": "testcross"
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        "To breed an individual in this manner."
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        "(genetics) To breed an individual in this manner."
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      "word": "test cross"
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    "Test cross"
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  "word": "testcross"
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