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Similarity in the G-band patterns of constitutive heterochromatin of the composite X and Y chromosomes of certain rodents

โœ Scribed by T. Sharma; I. K. Gadi; R. Raman

Publisher
Springer Netherlands
Year
1981
Tongue
English
Weight
339 KB
Volume
54
Category
Article
ISSN
0016-6707

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โœฆ Synopsis

Trypsin G-band patterns of the composite X and large Y chromosomes of 6 rodent species have been compared. Whereas the conservative portion of the X chromosome shows identical banding in all the species, the pattern of the constitutively heterochromatic (non-conservative) segment of the X is found to be characteristic of every individual species. However, similarity occurs between the heterochromatins of the X and enlarged Y of most of the species studied. The resemblance between X and Y is suggestive of organizational homology between the concomitantly increased chromatin of X and Y. Possible modes of origin of identical chromatin in the two nonhomologous chromosomes have been discussed.

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โœ Anneke A. Bosma ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› Springer Netherlands ๐ŸŒ English โš– 400 KB

It appears from the G-banding patterns that the karyotypes of the wart hog (Phacochoerus aethiopicus), the European wild boar (Sus scrofa) and the domestic pig (Sus scrofa) are very similar, the differences in karyotype between these species consisting of Robertsonian translocations only. This close