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Table 4 Transmission pattern of CBS T833C/844ins68 from mother to MR proband.

From: Cystathionine β-synthase T833C/844INS68 polymorphism: a family-based study on mentally retarded children

  Allele Transmitted Non-transmitted χ2 P value
HHRR analysis (all mothers) 1 176 180 2.0449 0.1527
  2 6 2   
HHRR analysis (heterozygous mothers only) 1 2 6 4.00 0.0455
  2 6 2