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=== Human chromosomes === [[File:Human karyotype with bands and sub-bands.png|thumb|Human [[karyotype|karyogram]], with each row vertically aligned at centromere level, and with annotated [[Locus (genetics)|bands and sub-bands]]. It is a graphical representation of the idealized human [[diploid]] karyotype. It shows dark and white regions on [[G banding]]. It shows both the female (XX) and male (XY) versions of the [[sex chromosome]]. {{further|Karyotype}}]] {| class="wikitable sortable" style="text-align: center;" |+ Table of human chromosomes with data on centromeres and sizes. |- ! Chromosome !! Centromere <br /> position ([[Base pair|Mbp]]) !! Category !! Chromosome <br /> Size (Mbp) !! Centromere <br /> size (Mbp) |- | [[Chromosome 1 (human)|1]] || 125.0 || metacentric || 247.2 || 7.4 |- | [[Chromosome 2 (human)|2]] || 93.3 || submetacentric || 242.8 || 6.3 |- | [[Chromosome 3 (human)|3]] || 91.0 || metacentric || 199.4 || 6.0 |- | [[Chromosome 4 (human)|4]] || 50.4 || submetacentric || 191.3 || β |- | [[Chromosome 5 (human)|5]] || 48.4 || submetacentric || 180.8 || β |- | [[Chromosome 6 (human)|6]] || 61.0 || submetacentric || 170.9 || β |- | [[Chromosome 7 (human)|7]] || 59.9 || submetacentric || 158.8 || β |- | [[Chromosome 8 (human)|8]] || 45.6 || submetacentric || 146.3 || β |- | [[Chromosome 9 (human)|9]] || 49.0 || submetacentric || 140.4 || β |- | [[Chromosome 10 (human)|10]] || 40.2 || submetacentric || 135.4 || β |- | [[Chromosome 11 (human)|11]] || 53.7 || submetacentric || 134.5 || β |- | [[Chromosome 12 (human)|12]] || 35.8 || submetacentric || 132.3 || β |- | [[Chromosome 13 (human)|13]] || 17.9 || acrocentric || 114.1 || β |- | [[Chromosome 14 (human)|14]] || 17.6 || acrocentric || 106.3 || β |- | [[Chromosome 15 (human)|15]] || 19.0 || acrocentric || 100.3 || β |- | [[Chromosome 16 (human)|16]] || 36.6 || metacentric || 88.8 || β |- | [[Chromosome 17 (human)|17]] || 24.0 || submetacentric || 78.7 || β |- | [[Chromosome 18 (human)|18]] || 17.2 || submetacentric || 76.1 || β |- | [[Chromosome 19 (human)|19]] || 26.5 || metacentric || 63.8 || β |- | [[Chromosome 20 (human)|20]] || 27.5 || metacentric || 62.4 || β |- | [[Chromosome 21 (human)|21]] || 13.2 || acrocentric || 46.9 || β |- | [[Chromosome 22 (human)|22]] || 14.7 || acrocentric || 49.5 || β |- | [[X chromosome|X]] || 60.6 || submetacentric || 154.9 || β |- | [[Y chromosome|Y]] || 12.5 || acrocentric || 57.7 || β |- |} Based on the micrographic characteristics of size, position of the centromere and sometimes the presence of a [[chromosomal satellite]], the human chromosomes are classified into the following groups:<ref>{{cite journal|author=Erwinsyah, R., Riandi, & Nurjhani, M.|year=2017|title=Relevance of human chromosome analysis activities against mutation concept in genetics course. IOP Conference Series.|journal=Materials Science and Engineering|doi=10.1088/1757-899x/180/1/012285|s2cid=90739754 |doi-access=free}}</ref> {|class=wikitable ! Group ! Chromosomes ! Features |- | Group A | Chromosome 1β3 | Large, metacentric and submetacentric |- | Group B | Chromosome 4β5 | Large, submetacentric |- | Group C | Chromosome 6β12, X | Medium-sized, submetacentric |- | Group D | Chromosome 13β15 | Medium-sized, acrocentric, with [[satellite chromosome|satellite]] |- | Group E | Chromosome 16β18 | Small, metacentric and submetacentric |- | Group F | Chromosome 19β20 | Very small, metacentric |- | Group G | Chromosome 21β22, Y | Very small, acrocentric, with [[satellite chromosome|satellite]] |}
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