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Table 5 Estimation of age of polymorphism fixation.

From: A detailed Hapmap of the Sitosterolemia locus spanning 69 kb; differences between Caucasians and African-Americans

SNP

Allele

Number of Disease Chromosomes*

Number of Healthy Chromosomes*

Frequency (disease chromosome)

Frequency (healthy chromosome)

Recombination Fraction

Age Estimate (generations)

R50C

C

12

12

1

1

NA

 

Q604E

G

2

1

0.167

0.083

0.058833

17.7

5'UTR-19

T

11

10

0.917

0.833

0.033059

9.1

D19H

G

12

12

1

1

NA

NA

INT1-21

C

12

7

1

0.583

0.005

0

INT1-7

C

11

11

0.917

0.917

NA

 

C54Y

A

9

5

0.75

0.417

0.02749

8.8

E238L

G

12

12

1

1

NA

 

T400K

A

10

3

0.833

0.25

0.0002

2387

INT10-50

T

12

12

1

1

NA

 

A565A

C

12

12

1

1

NA

 

G575R

G

12

12

1

1

NA

 

A632V

C

11

10

0.917

0.833

0.005692

52.9

  1. *Out of a total of 12 disease and 12 normal chromosomes, see Methods