The behaviour of chromosomes during meiosis was studied in
females of Earias vitiella (fabr.) (Noctuidae, Lepidoptera) The haploid
chromosome number is 31. All bivalents are homomorphic and sex chromosomes can
not be identified. Throughout prophase, frou pachytene until pro-metaphase all
the bivalents remain associated non-homologously via telomeres, forming a
single multibranched chain. Subsequently, non-homologous associations
disappear, as a result all the bivalents become free and get arranged on the
metaphase plate. They show clear cut reductional split. Diplotene structures
are absent. Hence the meiosis appears
achiasmatic.
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