The former Survivor winners, who have been a couple for almost eight years, will be one of the teams in the upcoming fall season of the reality show.
"He says that if he feels so moved on the Race that it's possible," Morasca told People. "It is definitely something that we think about!"
While Morasca is hopeful of a marriage proposal, Zohn himself wasn't as serious about the idea.
"If we're repelling off the Eiffel Tower and I can get to a zip tie and make it into the form of a ring, I might put it on her finger," Zohn laughed.
Zohn says he feels particularly lucky being able to take part in the show, after battling a rare form of Hodgkin's lymphoma for much of 2010.
"The cancer is still in remission and it will be forever, and I'm real excited about that," Zohn explained. "That's really one of the reasons why I'm personally doing The Amazing Race, because from where I was last year, in a hospital room attached to a pump, no matter what happens out there it's going to be okay because it's a celebration of life."
The Amazing Race will return on Monday, September 25 at 8/7c on CBS.