SANFORD, Fla. — A jury of six women will decide whether George Zimmerman was acting in self-defense when he fatally shot Trayvon Martin, an unarmed black teenager, in an altercation at a townhouse community here in February last year. Mr. Zimmerman is charged with second-degree murder in the case, which set off national protests and cries of injustice because he was not initially arrested after claiming self-defense.

The jurors, none of them black, include a Hispanic woman with eight children, an animal rescuer who once had a concealed-weapons permit, and a woman who said she had used Mr. Martin’s death as a cautionary example for her two adolescent children. Of the four alternates chosen for the case, two were men, and all were white. Nearly all of the jurors have children.

That the final jury was made up solely of women was unusual, legal experts said. But what might resonate more in this racially charged case is that all but one of the jurors is white.

Diana Tennis, a defense lawyer based in Orlando, said the chances of having a six-person jury without any black jurors were high given the demographics of Seminole County, where 11 percent of the population is black. But should Mr. Zimmerman, who is Hispanic, be acquitted by a jury that includes no blacks could become a point of contention in the trial’s aftermath, she said.