The frequencies of three karyotypes (the acrocentric karyotype and karyotypes homozygous and heterozygous for metacentrics) and homozygotes and heterozygotes for fusion ik recorded in five populations of the Oktiabrskiy race (after Table 2). Black bars – observed frequency, white – expected frequency: a – homozygous karyotype (hn, ik), b – heterozygous karyotype (h/n, i/k), c – acrocentric karyotype (h, n, i, k), d – homozygote ik, e – heterozygote i/k, f – homozygote i, k.