The reduced variability of

The reduced variability of small populations is not always due to accidental gene loss, but sometimes to the fact that the entire population was started by a single pair or by a single fertilized female. These ‘founders’ of the population carried with them only a very small proportion of the variability of the parent population. … Read more

If half-black Barack Obama

If half-black Barack Obama had decided years ago to call himself white – which his genes certainly entitled him to do – his story would have carried very different meaning. If millions of part-black people had followed him into whiteness, then the N.A.A.C.P. would be in true crisis. Eric Liu