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In human genetics, a human Y-chromosome DNA haplogroup is a haplogroup defined by mutations in the non- recombining portions of DNA from the male-specific Y chromosome (called Y-DNA). Many people within a haplogroup share similar numbers of short tandem repeats (STRs) and types of mutations called single-nucleotide polymorphisms (SNPs).
The most common Y-chromosomal haplogroup among the Svans is G2a (90%), in the second place is the Y-chromosomal haplogroup R1a (5%), in the third place is the Y-chromosomal haplogroup J2a1 (about 3%). Among mitochondrial haplogroups H (17.9%), K (15.8%), W6 (13%), T (9.24%), U1 (7.61%), X2 (6, 52%), U2 (5.98%) are common haplogroups.