Twin Studies

Although monozygotic (MZ) twins are genetically identical, dizygotic (DZ) twins share only half of the genome. The twin method compares concordance rates for a trait between MZ and DZ twins. A significantly higher rate in MZ compared to DZ twins who share a similar environment suggests that genetic influences are present. Most studies using this method have found two to five times higher concordance rates for BP disorder in MZ compared to DZ twins. A Danish twin study found that when the proband had BP disorder, the concordance in MZ twins was 69% compared to 19% in DZ twins (3.5: 1 ratio), and when the proband had UP disorder the MZ concordance was 54%, whereas the DZ concordance was 24% (2: 1 ratio).

Adult Dyslexia

Adult Dyslexia

This is a comprehensive guide covering the basics of dyslexia to a wide range of diagnostic procedures and tips to help you manage with your symptoms. These tips and tricks have been used on people with dyslexia of every varying degree and with great success. People just like yourself that suffer with adult dyslexia now feel more comfortable and relaxed in social and work situations.

Get My Free Ebook


Post a comment