THE MEIOTIC LOSS OF UNPAIRED CHROMOSOMES IN DROSOPHILA MELANOGASTER

Abstract

N cytological studies of species hybrids, Since that time this has become a matter of common observation in plant studies, not only in species hybrids, which may represent a special case, but also in more normal situations in which univalents have been observed. In Drosophila, the suggestion that a chromosome which does not pair with its homolog might be lost during the meiotic divisions has been made by Further evidence is presented below which supports the assumption that such loss does occur in Drosophila. In addition, information has been collected which bears on possible mechanisms of regular chromosome disjunction.