Boys will be Xs, but Y is that?

In this case, at least.

I'm foregoing the usual Religion/Buddhist Thursday post to comment on the linked article. Its about three people - two brothers and a paternal uncle. The brothers are married to women.

All three have all the traits of being male. As the article states:

Both brothers are married to women, and they and their uncle have the sexual anatomy, behavior, growth, and skeletal development of males. All have normal health and intelligence.

Except that all three lack the Y chromosome that makes a male a male. Instead, they have two X chromosomes, the genetic marker of women.