DNA expert. Testimony starts 3 hours 23 minutes into this video:
16 locations tested ( including the sex marker ).
13:30 Still foundational, explaining DNA testing.
13:32 Wall swab, mIxture of DNA.
Major contributor was Jodi Arias.
Minor contributor was Travis Alexander.
Neither were full profiles. No exclusions. Opinion is both were present. Not known to be blood.
There was a hair analysed : it was Jodi’s hair, the root was DNA matched to Jodi. Biological material on the hair was DNA matched to Travis Alexander.
[ Hair was item number 6 from the scene, per Juan Martinez ]
13:38 Cross examination : no questions. No jury questions.
Note, according to http://www.crimemuseum.org/blog/what-can-you-tell-from-forensic-hair-examination
Hair can yield DNA evidence, if hair is pulled out by the root, as in some violent struggles, it will contain root pulp which is a good source of nuclear DNA (nDNA), the type of DNA most often used in forensics. The hair shaft does not contain nDNA, so the 100-150 strands of hair most people lose daily will not contain a root or nDNA, but it does have mitochondrial DNA (mDNA).
Conclusion : Travis likely pulled some of Jodi’s hair out during the struggle.