Marquis played women's collegiate basketball at
Queens College, City University of New York, where she was a two-time All-American. On February 22, 1975, she played for Queens College in the first women's basketball game held at Madison Square Garden. The Queens College team was coached by
Lucille Kyvallos. Among Marquis's teammates was
Donna Orender, who later served as president of the Women's National Basketball Association. Queens College lost the game to Immaculata College, coached by Cathy Rush. Marquis was named to the USA Basketball National Team to represent the US at the 1976 Olympics, the first year that women's basketball would be played at the Olympics. The USA team ended with a record of 3–2, losing to the eventual gold medal champion USSR in the semifinal game, and winning the final game against Czechoslovakia to take home the silver medal. In 2009, Marquis became first woman of color inducted into the
New York City Basketball Hall of Fame. ==After basketball==