Angola and South African Giraffes can be uniquely identified by
their maternal gene profile For the study, the researchers created a profile of the subspecies» mitochondrial DNA, using tissue samples from about 160 giraffes from various populations across the entire African continent.
Also see Claudia Liebl et al,
Gene expression
profiling following
maternal deprivation: involvement of the brain renin - angiotensin system, Frontiers in Molecular Neuroscience., May 2009, Volume 2, Article 1