Acclaimed astrophysicist Neil deGrasse Tyson is under fire after conservatives uncovered footage of him alleging that chromosomes are insufficient when it comes to determining a person's gender because identity is a choice.

"Apparently, the XX/XY chromosomes are insufficient because when we wake up in the morning, we exaggerate whatever feature we want to portray the gender of our choice, either the one you're assigned, the one you choose to be, whatever it is," Tyson told sports television personality Stephen A. Smith in a May interview.

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The United States is a land that values the pursuit of happiness, Tyson argued.

"Suppose, no matter my chromosomes, today I feel 80% female, 20% male — I'm gonna put on makeup," he said. "Tomorrow, I might feel 80% male. I'll remove the makeup, and I'll wear a muscle shirt."

"Why do you care?" he added. "What business is it of yours to require that I fulfill your inability to think of gender on a spectrum?"

Conservatives such as detransitioner Chloe Cole have taken issue with Tyson's argument, and reactions to his interview with Smith have caused the clip to go viral.

"How about we stop confusing basic human biology with cosmetics," Cole said in a video posted to social media. "Like, what a weird jump. I don't wear makeup most days. If I leave the house without makeup on, does that make me like 70% male?"

Cole added, "If it was only truly about aesthetics, nobody would care. It's my business because you're using 1950s gender stereotypes to justify and ideology that leads to the sterilization and mastectomies of 15-year-old girls who just don't fit in ... girls like me."

Cole was not the only one to attack Tyson's argument.

"I accidentally put my gym shorts on backward this morning," one user posted. "According to @neiltyson, that means I'm bisexual today."

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"He sure left science behind in THIS video!" another said.

"NDT's highest priority is maintaining his status as 'thinker to the elites,'" one user argued. "He will do & say anything to protect that. Which is equally fascinating & sad to watch."