Stress-related genes may be preferentially and rhythmically expressed as part of the circadian rhythms of older fruit flies, researchers report.
July 16, 2001|
In a Brief Communication in the July 12 Nature, Pardini et al. report the use of genetic analysis to track the movements of great white sharks, Carcharodon carcharias (Nature 2001, 412:139-140). Analysis of DNA sequences from the maternally inherited mitochondrial genome provided evidence for long-term isolation of female sharks in three distinct populations (off the coasts of South Africa, Australia and New Zealand). In contrast, they found no sequence differentiation for microsatellite loci in