Sequencing and Analysis of the Hydra Genome
Chapman, Kirkness et al., Nature
An international research collaboration reports their sequencing and analysis of the Hydra magnipapillata genome, and compare it to the genomes of several other organisms. "The Hydra genome has been shaped by bursts of transposable element expansion, horizontal gene transfer, trans-splicing, and simplification of gene structure and gene content that parallel simplification of the Hydra life cycle," the authors write. They team suggests that comparisons of the Hydra genome to the reported sequences of other animals have helped them to elucidate the evolution of several of the organism's characteristics.
DNA in Alaskan Permafrost Offers Insights into Mammoth Extinction
December 15, 2009
An international research team has detected mitochondrial DNA sequences from mammoths and prehistoric horses in 7,600 to 10,500 year old soil samples from central Alaska, causing researchers to rethink when — and how — mammoths and other large animals became extinct.
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