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A Comparative Analysis of the Chromosomes of the Guarani Group of Drosophila
James C. King
Vol. 1, No. 1/2 (Mar. - Jun., 1947), pp. 48-62
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2405403
Page Count: 15
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The chromosomes of the six species of the guarani group of Drosophila are described and compared in metaphase and prophase of somatic mitoses and in salivary cells. Noticeable differences in metaphases and prophases can, with one exception, be explained as differences in amount and arrangement of heterochromatin. In one case the difference is the result of the loss of a centromere and the fusion of two chromosomes. The salivary chromosomes bear out these conclusions. Three of the species can be involved in crosses producing hybrids which make possible a more exact comparison of the chromosomes of these three species in metaphases, prophases and salivaries.
Evolution © 1947 Society for the Study of Evolution