DNA replication, G- and C-bands and meiotic behaviour of supernumerary chromosomes of Rattus rattus (Linn.)

Raman, Rajiva ; Sharma, T. (1974) DNA replication, G- and C-bands and meiotic behaviour of supernumerary chromosomes of Rattus rattus (Linn.) Chromosoma, 45 (1). pp. 111-119. ISSN 0009-5915

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Official URL: http://www.springerlink.com/content/t01u2m2544hm32...

Related URL: http://dx.doi.org/10.1007/BF00283834

Abstract

Supernumerary chromosomes have been observed in a few individuals of three subspecies of Rattus rattus from India and Nepal. The supernumerary chromosomes are late replicating and positively heteropycnotic during meiosis which characterize their heterochromatic nature. Their G-banding patterns do not exactly resemble the patterns exhibited by the chromosomes of similar size and morphology of the normal complement. The supernumerary chromosomes become conspicuous for the lack of a centromeric C-band in them as compared to the prominent C-bands in other chromosomes of the complement.

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