Biological divisions based on the Y-Chromosome, a non-recombinant sex chromosome inherited paternally. For unlisted subclades, or for discussion that isn't subclade-specific, see "Other."
Y-DNA Haplogroup A (A0-P305 through BT-M42 inclusive) section
Y-DNA Haplogroup B-M60 section
Y-DNA Haplogroup C-M130 section
Y-DNA Haplogroup D-M174 section
Main Y-DNA Haplogroup E-M40 section (primarily for parahaplogroup discussions). Visit appropriate sub-forums for downstream SNPs
Y-DNA Haplogroup E1a-M33 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup E1b1b-M215 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup E2-M75 (all downstream SNPs inclusive) sub-forum
Main Y-DNA Haplogroup G-M201 section. Visit appropriate sub-forums for downstream SNPs
Y-DNA Haplogroup G2a-P15 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup H-M69 section
Main Y-DNA haplogroup I-M170 section (primarily for parahaplogroup discussions). Visit appropriate sub-forums for downstream SNPs
Y-DNA Haplogroup I1-M253 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup I2-M438 (all downstream SNPs inclusive) sub-forum
Main Y-DNA Haplogroup J-12f2.1 section (primarily for parahaplogroup discussions). Visit appropriate sub-forums for downstream SNPs
Y-DNA Haplogroup J1-M267 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup K-M9 forum including K-M526 (xLT) section
Y-DNA Haplogroup L-M20 section
Y-DNA Haplogroup M-M106 section
Main Y-DNA Haplogroup N-M231 section. Visit appropriate sub-forums for downstream SNPs
Y-DNA Haplogroup N1c-Tat (all downstream SNPs inclusive) sub-forum
Main Y-DNA Haplogroup O-M175 section (primarily for parahaplogroup discussions). Visit appropriate sub-forums for downstream SNPs
Y-DNA Haplogroup O1-MSY2.2 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup O3-M122 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup Q-M242 section
Main Y-DNA Haplogroup R-M207 section (primarily for parahaplogroup discussions). Visit appropriate sub-forums for downstream SNPs
Y-DNA Haplogroup R1a general sub-forum
Y-DNA Haplogroup R1a-Z283 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup R1a-Z93 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup R1b general sub-forum
Y-DNA Haplogroup R1b-M73 sub-forum
Y-DNA Haplogroup R1b-M343 sub-forum for subclades or associated parahaplogroups negative for downstream SNPs
Y-DNA Haplogroup R1b-Z2103/Z2105 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup R1b-U106 general sub-forum (please visit relevant sub-sections for downstream SNP's)
Y-DNA Haplogroup R1b-P312 (all downstream SNPs including R-U152 and R-L21) sub-forum
Y-DNA Haplogroup R2-M479 (all downstream SNPs inclusive) sub-forum
Y-DNA Haplogroup T-M70 section
Y-Chromosome discussions not covered in other sub-forums, including discussions on root SNPs and analysis techniques