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.
The composition of race and ethnicity in the National Basketball Association has changed throughout the league's history. The first non-white player to enter the league was Wataru Misaka in 1947. According to racial equality activist Richard Lapchick, the NBA in 2015 was composed of 74.4 percent black players, 23.3 percent white players, 1.8 percent Latino players, and 0.2 percent Asian players. The league has the highest percentage of black players of any major professional sports leagues in th