XY Bias: How Male Biology Students See Their Female Peers
www.theatlantic.com/science/archive/2016/02/male-biology-students-underestimate-their-female-peers/462924
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Put it this way: To the men in these classes, a woman would need to get an A to get the same prestige as a man getting a B.