Atopy is a predisposition toward developing certain allergic hypersensitivity reactions. Atopy may have a hereditary component, although contact with the allergen or irritant must occur before the hypersensitivity reaction can develop.
As of 2012, 63.9 percent of players playing in Major League Baseball are white. There is no way of telling the exact number due to the number of players.
Blacks Represent 70 Percent Of NFL Players, Fan Base 83 Percent White. Seventy percent of African-American men comprise NFL rosters despite representing only six percent of the United States' population. While the majority of NFL players are black, the NFL fan base is 83 percent white and 64 percent male. The NFL has no African-Americans who are a majority owner of a team and no African-American CEOs or Presidents.