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Relative DNA contents of somatic nuclei of ox, sheep and goat

✍ Scribed by A. T. Sumner; R. A. Buckland

Publisher
Springer
Year
1976
Tongue
English
Weight
305 KB
Volume
57
Category
Article
ISSN
0009-5915

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✦ Synopsis

Diploid ox nuclei contain about 14% more DNA than nuclei from sheep of the same sex. Goat nuclei have a similar DNA content to those of sheep. In view of the similar chromosome banding patterns in these species, it appears that chromosome evolution must have involved numerous minute interstitial deletions of additions of DNA. Although chromosomes which have similar banding patterns in these three species may be regarded as homologous in this respect, and can be regarded as having a common evolutionary origin, they are not homologous for the quantity of their DNA.

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Male haploidy in rotifers: Relative DNA
Male haploidy in rotifers: Relative DNA content of nuclei from male and female asplanchna
✍ Jones, Philip A. ;Gilbert, John J. πŸ“‚ Article πŸ“… 1976 πŸ› John Wiley and Sons 🌐 English βš– 242 KB

## Abstract In __A. sieboldi__ mitotic nuclei of males had one‐half the nuclear DNA content of those of females. Spermatocytes from testes had lc DNA contents. These observations indicate that the male is haploid and that spermatogenesis is atypical and involves no reductional divisions.