Origins of Hutu, Tutsi and Twa adults has a high capacity for lactose digestion, a surprisingly high number for an agrarian people, which Mamdani suggests may be the result of centuries of intermarriage with Tutsi. Bethwell Ogot in the 1988 UNESCO "General History" further notes that the number of pastoralists in Rwanda increased sharply around the fifteenth century. Although Luis et al. (2004) in a more general study on bi-allelic markers in many African countries found a statistically significant genetic difference between Tutsi and Hutu, the overall difference were not large. Modern-day genetic studies of the Y-chromosome generally indicate that the Tutsi, like the Hutu, are
Rwandan genocide remember is that there was a genocide. There was an attempt to eliminate Tutsis – men, women, and children – and to erase any memory of their existence." Out of a population of 7.3 million people, 84% of whom were Hutu, 15% Tutsi and 1% Twa, the official figures published by the Rwandan government estimated the number of victims of the genocide to be 1,070,014 in 100 days. It is estimated that about 300,000 Tutsi survived the genocide. Thousands of widows, many of whom were subjected to rape, are now HIV-positive. There were about 400,000 orphans and nearly 85,000 of