Final answer:
The fifteenth amendment gave Black men the right to vote regardless of race or color, but it did not immediately lead to universal suffrage as it was undermined by literacy and property qualifications in southern states.
Step-by-step explanation:
The real result of the fifteenth amendment was that it gave Black men the right to vote regardless of race or color. However, it did not immediately lead to universal adult suffrage because it was undermined by literacy and property qualifications in southern states. These qualifications allowed states to deny Black people the right to vote based on arbitrary grounds such as literacy, landownership, affluence, or political knowledge. Therefore, while the fifteenth amendment was an important step towards expanding voting rights, it did not fully achieve universal suffrage.