Uppsala University

The Tree of Life may be a bush

New species evolve whenever a lineage splits off into several. Because of this, the kinship between species is often described in terms of a 'tree of life", where every branch constitutes a species. Now, researchers at Uppsala ...

dateAug 18, 2015 in Evolution
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DNA which only females have

In many animal species, the chromosomes differ between the sexes. The male has a Y chromosome. In some animals, however, for example birds, it is the other way round. In birds, the females have their own sex chromosome, the ...

dateJun 04, 2015 in Biotechnology
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