Google search :
1. prejudice, discrimination, or antagonism directed against someone of a different race based on the belief that one's own race is superior.
synonyms: racial discrimination, racialism, racial prejudice, xenophobia, chauvinism, bigotry, casteism
2. the belief that all members of each race possess characteristics or abilities specific to that race, especially so as to distinguish it as inferior or superior to another race or races.
Dictionary.com :
1. a belief or doctrine that inherent differences among the various human racial groups determine cultural or individual achievement, usually involving the idea that one's own race is superior and has the right to dominate others or that a particular racial group is inferior to the others.
2. a policy, system of government, etc., based upon or fostering such a doctrine; discrimination.
3. hatred or intolerance of another race or other races.
Merriam Webster
1 : a belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race
2 a : a doctrine or political program based on the assumption of racism and designed to execute its principles
b : a political or social system founded on racism
3 : racial prejudice or discrimination
So, to assume that a black person has a natural talent for sports is racist and the symptoms look like 'assuming a black person does not have to work as hard to succeed at X sport and therefore is deserving of less praise and admiration because of the lower effort needed.'
So "assuming traits" does nothing to describe the meaning of racism, sexism, or feminism. This meme is sexist.