Jack Cashill reports in WND:

In a case filled with anomalies, chalk up one more: Unless one of the six chosen jurors is booted from the case, George Zimmerman will have an all female jury. 

And if the Hispanic Zimmerman is considered white – he would not be on trial if he were not – his jury is all white as well. In any case, there are no blacks among the six jurors or four alternates.

Murder trials can go on a long time and lots of original jurors can drop out in favor of the alternates, as happened with the O.J. Simpson case, so that can change jury demographics over time.

But, it sounds like the two sides in the Trayvon Martin case might have had different opinions in picking the jury on the primacy of sex v. race in loyalty, rather like a photographic negative of the O.J case. As I wrote in Is Love Colorblind?

... probably the most disastrous mistake Marcia Clark made in prosecuting O. J. Simpson was to complacently allow Johnny Cochran to pack the jury with black women. As a feminist, Mrs. Clark smugly assumed that all female jurors would identify with Nicole Simpson. She ignored pretrial research indicating that black women tended to see poor Nicole as The Enemy, one of those beautiful blondes who steal successful black men from their black first wives, and deserve whatever they get.

Perhaps Zimmerman's lawyer feels that this is basically a racial trial, while the prosecutor feels the way to win is to reproduce the successful media tactic of eliciting maternal feelings for the 12-year-old dead child? That could lead to them effectively agreeing upon a jury of nonblack women.