Human genes often best Neandertal ones in brain, testes
Researchers measured activity in people who have one version of each gene
![Neandertal brain](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/02/022317_TI_neanderthal-gene_main.jpg?fit=860%2C460&ssl=1)
BRAIN ACTIVITY Human versions of some genes are more active in certain parts of the brain than Neandertal versions. Side and back views of a brain show that activity levels of the Neandertal version of a gene called NTRK2 are lower in the cerebellum (blue area in lower back) than in other regions.
R.C. McCoy, J. Wakefield and J.M. Akey/Cell 2017