Common genetic ancestors lived during roughly same time period

Mitochondrial Eve and Y-chromosomal Adam—two individuals who passed down a portion of their genomes to the vast expanse of humanity—are known as our most recent common ancestors, or MRCAs. But many aspects of their existence, ...

Evolutionary changes in the genetic code of yeasts

Yeasts are some of the most important microbes used in biotechnology. Saccharomyces cerevisiae, the type of yeast used for making bread and beer, is just one representative of more than 1,500 yeast species found around the ...

Interacting mutations promote diversity

Genetic diversity arises through the interplay of mutation, selection and genetic drift. In most scientific models, mutants have a fitness value which remains constant throughout. Based on this value, they compete with other ...

Trimming the Tree of Life

(PhysOrg.com) -- In a sense, Antonis Rokas is an arborist: He is a member of a small cadre to scientists who are applying the growing power of genomics to untangle and correctly arrange the branches of the Tree of Life.

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