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How to calculate allele frequencies--a simple example. The sample size is 20, and there are 5 different VNTR/STR alleles: 1,2,3,4,5.
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Genotype |
Number of Alleles in the Genotype of each type |
|
| |
|
1 |
2 |
3 |
4 |
5 |
Total |
| 1 |
(1,2) |
1 |
1 |
|
|
|
2 |
| 2 |
(1,2) |
1 |
1 |
|
|
|
2 |
| 3 |
(3,4) |
|
|
1 |
1 |
|
2 |
| 4 |
(3,4) |
|
|
1 |
1 |
|
2 |
| 5 |
(3,5) |
|
|
1 |
|
1 |
2 |
| 6 |
(2,5) |
|
1 |
|
|
1 |
2 |
| 7 |
(3,4) |
|
|
1 |
1 |
|
2 |
| 8 |
(3,3) |
|
|
2 |
|
|
2 |
| 9 |
(1,4) |
1 |
|
|
1 |
|
2 |
| 10 |
(1,2) |
1 |
1 |
|
|
|
2 |
| 11 |
(1,5) |
1 |
|
|
|
1 |
2 |
| 12 |
(4,5) |
|
|
|
1 |
1 |
2 |
| 13 |
(1,4) |
1 |
|
|
1 |
|
2 |
| 14 |
(1,5) |
1 |
|
|
|
1 |
2 |
| 15 |
(4,4) |
|
|
|
2 |
|
2 |
| 16 |
(4,4) |
|
|
|
2 |
|
2 |
| 17 |
(2,3) |
|
1 |
1 |
|
|
2 |
| 18 |
(2,4) |
|
1 |
|
1 |
|
2 |
| 19 |
(1,4) |
1 |
|
|
1 |
|
2 |
| 20 |
(2,4) |
|
1 |
|
1 |
|
2 |
| Total |
|
8 |
7 |
7 |
13 |
5 |
40 |
| Frequency |
|
0.20(8/40) |
0.18(7/40) |
0.18(7/40) |
0.33(13/40) |
0.13(5/40) |
|
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