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Table 3 Probability of sib-ship for three pool sizes.

From: My sister's keeper?: genomic research and the identifiability of siblings

N= 100,000

q

M = 1

M = 10

M = 20

M = 30

M = 40

M = 50

M = 60

M = 70

M = 80

M = 90

0

0.00001

1.00E-05

1.00E-05

1.00E-05

1.00E-05

1.00E-05

1.00E-05

1.00E-05

1.00E-05

1.00E-05

0.05

1.10E-05

2.67E-05

7.11E-05

0.000189

0.000505

0.001345

0.003578

0.009482

0.024886

0.063706

0.1

1.21E-05

6.64E-05

0.000441

0.002923

0.019099

0.114527

0.462126

0.850907

0.974301

0.996045

0.15

1.31E-05

0.000148

0.002194

0.031572

0.325877

0.87757

0.990679

0.999366

0.999957

0.999997

0.2

1.40E-05

0.000287

0.008152

0.190701

0.871059

0.994863

0.99982

0.999994

1

1

0.25

1.47E-05

0.000472

0.021816

0.512966

0.980292

0.999574

0.999991

1

1

1

0.3

1.52E-05

0.000666

0.042483

0.747176

0.994946

0.999924

0.999999

1

1

1

0.35

1.55E-05

0.000823

0.063574

0.848341

0.997835

0.999974

1

1

1

1

0.4

1.57E-05

0.000924

0.078846

0.88788

0.998637

0.999985

1

1

1

1

0.45

1.58E-05

0.000975

0.086919

0.902796

0.998898

0.999989

1

1

1

1

0.5

1.58E-05

0.000989

0.089295

0.906621

0.998961

0.999989

1

1

1

1

N = 10,000,000

q

M = 1

M = 10

M = 20

M = 30

M = 40

M = 50

M = 60

M = 70

M = 80

M = 90

0

1.00E-07

1.00E-07

1.00E-07

1.00E-07

1.00E-07

1.00E-07

1.00E-07

1.00E-07

1.00E-07

1.00E-07

0.05

1.10E-07

2.67E-07

7.11E-07

1.89E-06

5.05E-06

1.35E-05

3.59E-05

9.57E-05

0.000255

0.00068

0.1

1.21E-07

6.64E-07

4.41E-06

2.93E-05

0.000195

0.001292

0.008518

0.053991

0.274896

0.715775

0.15

1.31E-07

1.48E-06

2.20E-05

0.000326

0.004811

0.066884

0.515231

0.940333

0.995739

0.999711

0.2

1.40E-07

2.87E-06

8.22E-05

0.002351

0.063279

0.659483

0.982308

0.999372

0.999978

0.999999

0.25

1.47E-07

4.72E-06

0.000223

0.010423

0.332172

0.959166

0.999099

0.999981

1

1

0.3

1.52E-07

6.66E-06

0.000443

0.028705

0.663129

0.992431

0.999886

0.999998

1

1

0.35

1.55E-07

8.24E-06

0.000678

0.052974

0.821712

0.997374

0.999968

1

1

1

0.4

1.57E-07

9.25E-06

0.000855

0.073378

0.879899

0.998527

0.999984

1

1

1

0.45

1.58E-07

9.76E-06

0.000951

0.084983

0.900612

0.99887

0.999988

1

1

1

0.5

1.58E-07

9.90E-06

0.00098

0.088497

0.905783

0.998951

0.999989

1

1

1

N = 6,000,000,000

q

M = 1

M = 10

M = 20

M = 30

M = 40

M = 50

M = 60

M = 70

M = 80

M = 90

0

1.60E-10

1.67E-10

1.67E-10

1.67E-10

1.67E-10

1.67E-10

1.67E-10

1.67E-10

1.67E-10

1.67E-10

0.05

1.80E-10

4.44E-10

1.18E-09

3.16E-09

8.42E-09

2.24E-08

5.98E-08

1.60E-07

4.25E-07

1.13E-06

0.1

2.00E-10

1.11E-09

7.35E-09

4.89E-08

3.25E-07

2.16E-06

1.43E-05

9.51E-05

0.000631

0.00418

0.15

2.10E-10

2.47E-09

3.66E-08

5.43E-07

8.06E-06

0.000119

0.001768

0.025594

0.280299

0.852397

0.2

2.30E-10

4.78E-09

1.37E-07

3.93E-06

0.000113

0.003217

0.084701

0.726254

0.987023

0.999542

0.25

2.40E-10

7.87E-09

3.72E-07

1.76E-05

0.000828

0.037674

0.648979

0.988676

0.999758

0.999995

0.3

2.50E-10

1.11E-08

7.39E-07

4.93E-05

0.00327

0.179341

0.935717

0.99897

0.999985

1

0.35

2.50E-10

1.37E-08

1.13E-06

9.32E-05

0.007623

0.387598

0.981185

0.999767

0.999997

1

0.4

2.60E-10

1.54E-08

1.43E-06

0.000132

0.012063

0.530447

0.990523

0.999897

0.999999

1

0.45

2.60E-10

1.63E-08

1.59E-06

0.000155

0.014878

0.595717

0.993092

0.999929

0.999999

1

0.5

2.60E-10

1.65E-08

1.63E-06

0.000162

0.01577

0.613392

0.993675

0.999936

0.999999

1

  1. In a sample pool of size N, provided below, the probability that two individuals are siblings given a match at a subset of SNPs is charted as a function of M, the number of independent SNPs that they match at, and the minor allele frequency, q.