Randomness tests on the sequence of ascal segregation classes in Neurospora crassa

Abstract

SUMMARYVarious statistical tests for randomness were made on the order of ascal classes in groups of asci from wild-type x asco crosses. There was no significant nonrandom clustering of asci of the same segregation class, nor a regular twinning of similar asci. Any apparent observed clustering of similar ascal classes is probably an artefact or due to chance. 2 x n 2 tests showed that frequencies of individual ascus classes from different perithecia were generally homogeneous, as were second division segregation frequencies. The tests described here for randomness in sequences of occurrences could be of general use in other areas of genetics.