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Through her work with the fruit fly Drosophila santomea, Dr Virginie Orgogozo aims to answer one of the most challenging questions of modern evolutionary biology: how do observable characteristics change between species and yet remain stable in a given species?
A team of researchers at the Institute of Evolutionary Biology in Barcelona deciphered the genetic mechanisms responsible for the evolutionary success of animals, including humans. The findings give insight on how life evolved from its simple one-cell form to complex multi-cellular organisms. The results, published on 21/4/2016 in Cell journal, may also provide hints how the life will evolve in future.
While women inherit two X chromosomes, the expressions of one of them is shut down during embryonic development. Men have one X chromosome and one Y chromosome. The switching off of women’s second X chromosome is thought to compensate for the presence of only one X in males versus two in females, to balance for X-linked gene products between the sexes. X-chromosome inactivation is also one of the clearest examples of what epigenetic mechanisms do to our genetic material: the DNA of the genes on the X is still present but not actively expressed or needed. Prof. Edith Heard was awarded ERC grants to understand the intricate processes behind the phenomenon, with unexpected results that changed the way gene regulation is now looked at.