Of 29 tetrads with mutants of meiotic origin, the majority (25) contained only one spore with a mutated allele.
We then estimated the effectiveness of control by predicting the number of tetrads in which red squirrel populations survived in 2003.
There was no significant relationship between duration of overlap and the amount of conifer present in each tetrad.
It was found that the large majority of mutant alleles generated during meiosis occurred as single mutants in one of the spores in a tetrad.
A subset of clones was verified more thoroughly by measuring under r40 magnification the sizes of the haploid colonies obtained after tetrad dissection.
Here we present the first tetrad analysis of mutations at a human minisatellite locus.
Two tetrads (nos. 31 and 32) had 3 alleles of large progenitor origin.
None of the models above provides an explanation for the duplications seen in tetrads nos. 26 and 28.
