West Virginia v. B. P. J. · ¶131

All of that is consistent with the course the Court takes today. Title IX prohibits various types of discrimination “on the basis of sex.” §1681(a). The Court understands the term “sex” in Title IX to mean biological sex, just as we understood that term in Title VII in Bostock. See ante, at 10. Likewise, the Court does not question that “on the basis of ” is perhaps but a synonym for “because of ” and thus does not require biological sex to be the sole cause of discrimination, just as we held in Bostock. See Franklin v. Gwinnett County Public Schools, 503 U. S. 60, 75 (1992).

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