Voorbeelden van tetrad

• The rest of the mutations were clearly generated during meiosis and occurred in tetrads with any progenitor alleles.

• For grey squirrels the expansion in tetrads occupied appeared to rise asymptotically, with the expansion declining after 1999.

• A subset of clones was verified more thoroughly by measuring under r40 magnification the sizes of the haploid colonies obtained after tetrad dissection.

• Red squirrels may have recolonized tetrads from which they were lost in the last 2 years of the sample period.

• There was no significant relationship between duration of overlap and the amount of conifer present in each tetrad.

• None of the models above provides an explanation for the duplications seen in tetrads nos. 26 and 28.

• We then estimated the effectiveness of control by predicting the number of tetrads in which red squirrel populations survived in 2003.

• The other three spores in these tetrads were non-mutants.