Table 1 Worked example of creation of the similarity score, with 8 SNPS.

From: The proportion of genetic similarity for liability for neuroticism in mother–child and mother–father dyads is associated with reported relationship quality

 

Number of risk alleles at each SNP

Parent and child genotypes identical?

Parent

Child

SNP1

0

1

No

SNP2

1

1

Yes

SNP3

1

2

No

SNP4

2

2

Yes

SNP5

1

0

No

SNP6

2

1

No

SNP7

2

1

No

SNP8

1

1

Yes

Proportion of identical genotypes

3/8 = 0.375

  
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