Skip to main content

Table 2 Mean repeat size in base pairs per window of 0.250 megabases in each human chromosome analyzed.

From: Is mammalian chromosomal evolution driven by regions of genome fragility?

Human chromosome Mean number of repeats in B bands Mean number of repeats in E bands Mean number of repeats in FS bands Mean number of repeats in no-FS bands
1 3,338.28 3,467.81 3,647.44** 3,213.66**
2 3,166.83 3,314.78 3,343.16 3,261.81
3 2,523.47** 3,104.42** 2,807.56 3,042.48
4 2,884.52 3,101.81 3,267.70 2,966.80
5 3,012.61 3,114.22 3,335.30* 2,943.73*
6 3,286.71 3,039.27 3,220.15 3,056.08
7 3,799.18 3,571.16 5,060.35** 2,830.71**
8 3,693.84* 3,065.77* 3,552.78* 3,118.19*
9 4,018.38 3,375.42 2,877.28 3,604.23
10 3,232.03 3,437.11 3,098.81* 3,651.40*
11 3,440.03 3,269.92 3,971.77** 3,017.47**
12 3,419.76 3,715.78 4,456.85** 3,112.39**
13 2,994.29 2,959.70 2,876.41 3,014.15
14 3,252.94 3,112.29 2,689.67* 3,267.68*
15 2,789.40* 3,302.97* 2,960.15 3,212.32
16 6,114.65** 4,414.38** 4,669.36 4,553.13
17 2,279.38** 4,346.49** 3,546.25* 4,314.01*
18 2,675.72* 3,175.75* 3,074.19 3,045.68
19 - 8,377.27 8,889.31 8,050.54
20 3,875.58 3,548.22 2,952.96* 3,755.64*
21 3,199.52* 5,062.95* - 3,924.18
22 - 5,533.07 6,132.57* 5,020.60*
Total 3,237.46** 3,501.78** 3,735.08** 3,333.41**
  1. Tukey-Kramer tests were calculated to evaluate the statistical difference among means in each chromosome and in the whole genome. In chromosomes 19 and 22 all bands are E bands and so no test is performed. No fragile sites have been described in the literature for human chromosome 21. Significant differences among band types are indicated as follows: *P = 0.05; **P = 0.002 (after Bonferroni correction applied to 22 samples). B bands, non-evolutionary bands; E bands, evolutionary bands; FS bands, bands containing fragile sites; no-FS bands, bands without fragile sites.