Summary
1. Seventeen autosomal colour mosaics in the budgerigar (Melopsittacus undulatus) are described: sixteen of these being “half-siders.” It is suggested that every one of them is the result of the elimination of the “blue” autosome.
2. The chromosome number is 50–60. There are three size classes: theX-chromosome is large: only oneX is present in the female. The very considerable number of small dot-like chromosomes makes it impossible to determine with certainty the actual number, and also to recognise chromosome loss. The large chromosomes show lagging.
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Crew, F.A.E., Lamy, R. Autosomal colour mosaics in the budgerigar. Journ of Genetics 30, 233–241 (1935). https://doi.org/10.1007/BF02982238
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DOI: https://doi.org/10.1007/BF02982238