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单词 map unit
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map unit
map unit n. Genetics (in a linkage map) the distance separating two linked genes corresponding to a recombination frequency of one per cent; also called centimorgan.
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1915 T. H. Morgan et al. Mechanism Mendelian Heredity iii. 64 In the construction of the chromosome maps shown in the frontispiece the distance taken as a unit is that within which 1 per cent. of crossing over will occur.]
1968 R. C. King Dict. Genetics Map unit, a number that corresponds to a recombination frequency of 1 per cent.
1982 Jrnl. Virol. 42 488 Early RNA..selected by hybridization to adenoviral DNA fragments spanning the region from 14.7 to 31.5 map units.
1991 D. J. Weatherall New Genetics & Clin. Practice (ed. 3) ii. 7 The distance separating two loci that show recombination in 1 out of 100 gametes is called a map unit, or centimorgan.
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