Jordan explained that there are plenty of families where the brothers and sisters aren't biologically related.

"I'm pretty sure there's white people out there with other ethnicities brothers and sisters. Doesn't mean biological. It's the world that we live in," he said.

When Kimmel pressed further about whether this is "one of the big secrets" of the film, Jordan said it was mostly that he didn't feel the need to explain something that seems obvious.

"It's kind of self-explanatory. It's one of those things where I don't like drawing attention to the ignorance sometimes," he said. "You gotta let it be what it is."

When Kimmel argued that people would be asking this question, Jordan made it clear: "There's a thing called adoption. It happens."

Jordan also talked about his role in another highly anticipated movie, the Rocky spinoff Creed, in which he plays Apollo Creed's son, Adonis, who seeks out Rocky as a trainer and mentor.

Sylvester Stallone recently posted a photo of himself and Jordan boxing together, and Jordan explained that in the photo, "We're training for my big fight. And he's showing me how to kind of take the hook to the body. Hook to the body; hook to the head. So he's teaching me kind of how to dig in and go for it."

Kimmel asked if Jordan's character would be punching beef and chasing chickens like Rocky did. Jordan said no to the meat, yes to the birds.

"I told 'em to give me the fattest, slowest, oldest chickens they could find 'cause I will not be embarrassed on screen," he said. "Literally, I had PAs exercise the chickens for two or three hours before I stepped into the cage."