| 单词 | tetrad |
| 释义 | tetrad noun[C] uk/ˈtet.ræd/us/ˈtet.ræd/agroupof fourcellsproducedduringcelldivision 四分染色体Cells
tetrad| American Dictionarytetrad noun[C] us/ˈte·træd/biology agroupof fourcellsproducedduringcelldivision Examplesoftetradtetrad The rest of the mutations were clearly generated during meiosis and occurred in tetrads with any progenitor alleles. From theCambridge English Corpus For grey squirrels the expansion in tetrads occupied appeared to rise asymptotically, with the expansion declining after 1999. From theCambridge English Corpus A subset of clones was verified more thoroughly by measuring under r40 magnification the sizes of the haploid colonies obtained aftertetraddissection. From theCambridge English Corpus Red squirrels may have recolonized tetrads from which they were lost in the last 2 years of the sample period. From theCambridge English Corpus There was no significant relationship between duration of overlap and the amount of conifer present in eachtetrad. From theCambridge English Corpus None of the models above provides an explanation for the duplications seen in tetrads nos. 26 and 28. From theCambridge English Corpus We then estimated the effectiveness of control by predicting the number of tetrads in which red squirrel populations survived in 2003. From theCambridge English Corpus The other three spores in these tetrads were non-mutants. From theCambridge English Corpus Two tetrads (nos. 31 and 32) had 3 alleles of large progenitor origin. From theCambridge English Corpus Such a pattern would also be produced if two clones within onetetradhappened to be altered due to purely phenotypic and not genetic reasons. From theCambridge English Corpus The number of tetrads in which both species were found increased from 1993 to 1997 and then decreased to a very low level by 2002. From theCambridge English Corpus Here we present the firsttetradanalysis of mutations at a human minisatellite locus. From theCambridge English Corpus It was found that the large majority of mutant alleles generated during meiosis occurred as single mutants in one of the spores in atetrad. From theCambridge English Corpus It was also assumed that once atetradhad been recorded as having grey squirrels present then they would be present in all subsequent years. From theCambridge English Corpus Of 29 tetrads with mutants of meiotic origin, the majority (25) contained only one spore with a mutated allele. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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