The Florida mother is accused of killing her 2-year-old daughter, Caylee.
The FBI examiner said Saturday that she examined a light-brown, 9-inch-long hair for this case.
She said the hair was similar to one pulled from Caylee's hair brush and was not similar to a hair sample from Anthony.
She also said the hair showed characteristics consistent with decomposition.
An assistant supervisor with the sheriff's office crime scene unit explained how he collected evidence from Anthony's car in 2008.
The prosecution says Caylee was suffocated after duct tape was placed over her mouth.
The defense contends she accidentally drowned in her grandparents' swimming pool.
Court has recessed until Monday.
(Copyright 2011 by The Associated Press. All Rights Reserved.)