Focus on J2 and sublineages: m172.blogspot.com; j2a4h2.blogspot.com;
Blogs: Dienekes Y chromosome, J2; Palisto: KurdishDNA
Community / Discussion: Personal unsubstantiated theories, prejudices and bad manners can happen, unfortunately. Always try to contribute positively and constructively.
FTDNA: Forum Y-DNA;
eng.MolGen.org Forum J Haplogroup (Y-DNA); J2 Haplogroup;
Anthrogenica.com: Forum J Haplogroup (Y-DNA), J2a-M410, J2b-M12;
Facebook: Haplogroup J2, Y-DNA Project Administrators, ISOGG;
Mailing Lists: GENEALOGY-DNA-L Archives;
Projects of enthusiasts: sources and/or authors are sometimes not listed and the influence of unsecured theories or beliefs can not be excluded. So use with caution and a critical review.
TheGeneticAtlas Map J, Y-pop-tree, frequencies;
Eupedia Map J2 & Table, Forum Y-DNA Haplogroups;