Olympic officials on Friday tried urgently to rebut what they described as widespread “misinformation” that had turned a 46-second Olympic boxing match at the Paris Games into a forum for fierce debates and complicated questions about biology and competitive advantage in women’s sports.

Mark Adams, the chief spokesman for the I.O.C., derided news articles and social media posts that he said sought to cast doubt — unfairly, in the view of Olympic officials and even some other competitors — on the gender of one of the boxers in the women’s competition, Imane Khelif of Algeria. Mr. Adams stressed at a news conference that Khelif is not transgender.

“There has been some confusion that somehow it’s a man fighting a woman,” Mr. Adams said.

“The question you have to ask yourself is, are these athletes women?” he added. “The answer is yes,” according to their eligibility, passport and history.

Khelif won her opening bout on Thursday when her Italian opponent, Angela Carini, refused to continue, and after she was cleared to compete in the Olympics despite being suddenly disqualified during last year’s world championships in a dispute about her eligibility.

Thursday’s fight ended after less than a minute when Carini abandoned the bout after taking a powerful punch to the face. Khelif, who had boxed as a woman for her entire career with occasional success, will fight next in the quarterfinals on Saturday.

Carini later told reporters that the controversy over her defeat “makes me sad” and that she was worried about the focus on Khelif. “If the I.O.C. said she can fight, I respect that decision,” she said.