The electrophoregram of VDR receptor gene fragments genotyping. (A)—Fok-I electrophoregram: Path 1—PCR product (267 bp), path 2—FF homozygote (267 bp), path 3 and 5—ff homozygote (198, 69 bp), path 4 and 6—heterozygous Ff (267, 198, 69 bp), path 7—molecular marker; (B)—Bsm-I electrophoregram: Path 1—molecular marker, path 2—BB homozygote (348 bp), path 3 and 5—heterozygous Bb (348, 243, 105 bp), path 4 and 6—bb homozygote (243, 105 bp), path 6—PCR product (348 bp); (C)—Taq-I electrophoregram: Path 1—molecular marker, path 2—TT homozygote (425, 205 bp), path 3 and 5—heterozygous Tt (425, 225, 205, 200 bp), path 4—tt homozygote (225, 205, 200 bp), path 5—PCR product (630 bp); (D)—Apa-I electrophoregram: Path 1—PCR product (630 bp), path 2—AA homozygote (630 bp), path 4 and 5—aa homozygote (484, 146 bp), path 3 and 6—heterozygous Aa (630, 484, 146 bp), path 7—molecular marker. The DNA band of 146 bp size is not visible on the gel.