A New York sociology professor is being investigated after he allegedly asked students to pick out trans women from a group of photos in a presentation titled 'Female or Shemale'.
One student snapped a picture of the slideshow and posted it on social media on Friday morning (local time) where it has been widely shared among students.
State University of New York College at Geneseo president, Denise A. Battles, said the school would be looking into the incident.
"A professor is reported to have presented materials and made comments about which some students have expressed concern," Battles said in a statement.
"We are taking the matter very seriously and are gathering the facts to determine if and what action is warranted."
Jillian Stemberg, the student who posted the photo, told BuzzFeed News that she and other students were disturbed by the presentation.
The class topic was gender, sexuality, and sexual identity, but Ms Stemberg said her professor never explained the point of the quiz.
"When I addressed him afterward he said it was partly for humour and partly to discuss sexual dimorphism."
However, the class didn't include any further discussion around sexual dimorphism, Ms Stemberg told Buzzfeed News.
She added that the professor, David Sorbello, commented inappropriately about some of the pictures, saying things like "'Be careful not to get too drunk or you'll take the wrong one home," or "'I'm definitely not going to the bar with you."
Ms Stemberg told BuzzFeed News soon after the photo was shared among students, she received a class-wide email from her professor notifying students that phones, laptops, and taking photos were now banned from his classroom.
This email reversed an earlier rule allowing students to take photos of slides to use for studying.