TABLE 4

Frequencies of various MI configurations for chromosomes 2 and 6 from the dy mutant and wild type

Wild typedy mutant
ChromosomeConfigurationObservedExpectedObservedExpected
2Ring (AB)380380349347.4
Rod (A)00910.6
Rod (B)001314.6
Univalents0020.4
Total380380373373
6Ring (AB)4848192192.9
Rod (A)346346227226.1
Rod (B)0054.1
Univalents0044.9
Total394394428428

The A and B in parentheses indicate the arms that are chiasmate. A represents the short arm of chromosome 2 or the long arm of chromosome 6, and B represents the long arm of chromosome 2, which carries a 5S rDNA site, or the short arm of chromosome 6, which carries an 18S–28S rDNA site.