Cloning promises genetic copies, but a growing body of research across dogs, mice, cattle, and primates shows that clones begin diverging from their donors almost immediately. Thousands of unique ...

A two-decade study into cloning has revealed a fundamental flaw in the technology, demonstrating that repeated duplication ...

Revealing the limitations of cloning, researchers who repeatedly cloned mice for two decades have discovered that such serial duplication triggers grave genetic mutations that accumulate over the ...

Add Yahoo as a preferred source to see more of our stories on Google. (Peter Finch/Stone/Getty Images) Scientists have pushed the limits of mammal cloning until the whole house of cards has come ...

A study identifies nearly 3,000 genes where one allele tends to be expressed more than the other, but the findings ignited controversy in the field. Unbalanced Allele Expression Associated with ...

Six years ago, scientists created a clone of an endangered U.S. species: a black-footed ferret named Elizabeth Ann. The researchers used cells from Willa, a donor ferret that had been dead for more ...