List of organisms by chromosome count

Source: Wikipedia, the free encyclopedia.

The list of organisms by chromosome count describes

plants, animals, protists, and other living organisms. This number, along with the visual appearance of the chromosome, is known as the karyotype,[1][2][3] and can be found by looking at the chromosomes through a microscope. Attention is paid to their length, the position of the centromeres, banding pattern, any differences between the sex chromosomes, and any other physical characteristics.[4] The preparation and study of karyotypes is part of cytogenetics
.

  Plants
  Other Eukaryotes
S. No. Organism
(Scientific name)
Chromosome number Picture Karyotype Notes Source
1 Jack jumper ant
(Myrmecia pilosula)
2/1 2 for females, males are haploid and thus have 1; smallest number possible. Other ant species have more chromosomes.[5] [5]
2 Spider mite
(Tetranychidae)
4–14 Spider mites (family
Tetranychidae) are typically haplodiploid (males are haploid, while females are diploid)[6]
[6]
3 Cricotopus sylvestris 4 [7]
4 Oikopleura dioica 6 [8]
5 Yellow fever mosquito
(Aedes aegypti)
6 The 2n=6 chromosome number is conserved in the entire family
Culicidae, except in Chagasia bathana, which has 2n=8.[9]
[9]
6
Indian muntjac

(Muntiacus muntjak)
6/7 2n = 6 for females and 7 for males. The lowest diploid chromosomal number in mammals.[10] [11]
7 Hieracium 8
8 Fruit fly
(Drosophila melanogaster)
8 6 autosomal and 2 allosomic (sex) [12]
9 Macrostomum lignano 8 [13]
10 Marchantia polymorpha 9 Typically haploid with dominant gametophyte stage. 8 autosomes and 1 allosome (sex chromosome). The sex-determination system used by this species and most other bryophytes is called UV. Spores can carry either the U chromosome, which results in female gametophytes, or the V chromosome, which results in males. The chromosome number n = 9 is the basic number in many species of Marchantiales. In some species of Marchantiales, plants with various ploidy levels (having 18 or 27 chromosomes) were reported, but this is rare in nature. [14]
11
Thale cress

(Arabidopsis thaliana)
10
12 Swamp wallaby
(Wallabia bicolor)
10/11 11 for male, 10 for female [15]
13 Australian daisy
(Brachyscome dichromosomatica)
12 This species can have more
B chromosomes
than A chromosomes at times, but 2n=4.
[16]
14 Nematode
(Caenorhabditis elegans)
12/11 12 for hermaphrodites, 11 for males
15 Spinach
(Spinacia oleracea)
12 [17]
16
Broad bean

(Vicia faba)
12 [18]
17
Yellow dung fly

(Scathophaga stercoraria)
12 10 autosomal and 2 allosomic (sex) chromosomes. Males have XY sex chromosomes and females have XX sex chromosomes. The sex chromosomes are the largest chromosomes and constitute 30% of the total length of the diploid set in females and about 25% in males.[19] [19]
18 Slime mold
(Dictyostelium discoideum)
12 [20]
19 Cucumber
(Cucumis sativus)
14 [21]
20 Tasmanian devil
(Sarcophilus harrisii)
14
21 Rye
(Secale cereale)
14 [22]
22 Pea
(Pisum sativum)
14 [22]
23 Barley
(Hordeum vulgare)
14 [23]
24 Aloe vera 14 The diploid chromosome number is 2n = 14 with four pair of long
sub metacentric chromosomes ranging from 4.6 μm to 5.4 μm.[24]
[24]
25 Koala
(Phascolarctos cinereus)
16
26 Kangaroo 16 This includes several members of genus Macropus, but not the red kangaroo (M. rufus, 20) [25]
27 Botryllus schlosseri 16 [26]
28 Schistosoma mansoni 16 2n=16. 7 autosomal pairs and ZW sex-determination pair.[27] [27]
29
Welsh onion

(Allium fistulosum)
16 [28]
30 Garlic
(Allium sativum)
16 [28]
31
Itch mite

(Sarcoptes scabiei)
17/18 According to the observation of embryonic cells of egg, chromosome number of the itch mite is either 17 or 18. While the cause for the disparate numbers is unknown, it may arise because of an
XO sex determination mechanism, where males (2n=17) lack the sex chromosome and therefore have one less chromosome than the female (2n=18).[29]
[29]
32 Radish
(Raphanus sativus)
18 [22]
33 Carrot
(Daucus carota)
18 The genus Daucus includes around 25 species. D. carota has nine chromosome pairs (2n = 2x = 18). D. capillifolius, D. sahariensis and D. syrticus are the other members of the genus with 2n = 18, whereas D. muricatus (2n = 20) and D. pusillus (2n = 22) have a slightly higher chromosome number. A few polyploid species as for example D. glochidiatus (2n = 4x = 44) and D. montanus (2n = 6x = 66) also exist.[30] [30]
34 Cabbage
(Brassica oleracea)
18
brussels sprouts, and cauliflower are all the same species and have the same chromosome number.[22]
[22]
35 Citrus
(Citrus)
18 Chromosome number of the genus Citrus, which including lemons, oranges, grapefruit, pomelo and limes, is 2n = 18.[31] [32]
36 Passion fruit
(Passiflora edulis)
18 [33]
37 Setaria viridis
(Setaria viridis)
18 [34]
38 Maize
(Zea mays)
20 [22]
39 Cannabis
(Cannabis sativa)
20
40 Western clawed frog
(Xenopus tropicalis)
20 [35]
41 Australian pitcher plant
(Cephalotus follicularis)
20 [36]
42 Cacao
(Theobroma cacao)
20 [37]
43 Eucalyptus
(Eucalyptus)
22 Although some contradictory cases have been reported, the large homogeneity of the chromosome number 2n = 22 is now known for 135 (33.5%) distinct species among genus Eucalyptus.[38] [39]
44 Virginia opossum
(Didelphis virginiana)
22 [40]
45 Bean
(Phaseolus sp.)
22 All species in the genus
tepary bean (P. acutifolius) and lima bean (P. lunatus).[22]
[22]
46 Snail 24
47 Melon
(Cucumis melo)
24 [41]
48 Rice
(Oryza sativa)
24 [22]
49
Silverleaf nightshade

(Solanum elaeagnifolium)
24 [42]
50
Sweet chestnut

(Castanea sativa)
24 [43]
51 Tomato
(Solanum lycopersicum)
24 [44]
52
European beech

(Fagus sylvatica)
24 [45]
53
Bittersweet nightshade

(Solanum dulcamara)
24 [46][47]
54
Cork oak

(Quercus suber)
24 [48]
55 Edible frog
(Pelophylax kl. esculentus)
26 Edible frog is the fertile hybrid of the pool frog and the marsh frog.[49] [50]
56 Axolotl
(Ambystoma mexicanum)
28 [51]
57
Bed bug

(Cimex lectularius)
29–47 26 autosomes and varying number of the sex chromosomes from three (X1X2Y) to 21 (X1X2Y+18 extra Xs).[52] [52]
58 Pill millipede
(Arthrosphaera magna attems)
30 [53]
59 Giraffe
(Giraffa camelopardalis)
30 [54]
60 American mink
(Neogale vison)
30
61 Pistachio
(Pistacia vera)
30 [55]
62 Japanese oak silkmoth (Antheraea yamamai) 31 [56]
63 Baker's yeast
(Saccharomyces cerevisiae)
32
64
European honey bee

(Apis mellifera)
32/16 32 for females (2n = 32), males are haploid and thus have 16 (1n =16).[57] [57]
65 American badger
(Taxidea taxus)
32
66 Alfalfa
(Medicago sativa)
32 Cultivated alfalfa is tetraploid, with 2n=4x=32. Wild relatives have 2n=16.[22]: 165  [22]
67 Red fox
(Vulpes vulpes)
34 Plus 0-8 B chromosomes. [58]
68
Sunflower

(Helianthus annuus)
34 [59]
69 Porcupine
(Erethizon dorsatum)
34 [60]
70
Globe artichoke

(Cynara cardunculus var. scolymus)
34 [61]
71 Yellow mongoose
(Cynictis penicillata)
36
72
Tibetan sand fox

(Vulpes ferrilata)
36
73 Starfish
(Asteroidea)
36
74 Red panda
(Ailurus fulgens)
36
75 Meerkat
(Suricata suricatta)
36
76 Cassava
(Manihot esculenta)
36 [62]
77
Long-nosed cusimanse

(Crossarchus obscurus)
36
78 Earthworm
(Lumbricus terrestris)
36
79 African clawed frog
(Xenopus laevis)
36 [35]
80
Waterwheel plant

(Aldrovanda vesiculosa)
38 [36]
81 Tiger
(Panthera tigris)
38
82 Sea otter
(Enhydra lutris)
38
83 Sable
(Martes zibellina)
38
84 Raccoon
(Procyon lotor)
38 [63]
85
Pine marten

(Martes martes)
38
86 Pig
(Sus)
38
87
Oriental small-clawed otter

(Aonyx cinerea)
38
88 Lion
(Panthera leo)
38
89 Fisher
(Pekania pennanti)
38 a type of marten
90 European mink
(Mustela lutreola)
38
91 Coatimundi 38
92 Cat
(Felis catus)
38
93 Beech marten
(Martes foina)
38
94 Baja California rat snake
(Bogertophis rosaliae)
38 [64]
95 American marten
(Martes americana)
38
96
Trans-Pecos ratsnake

(Bogertophis subocularis)
40 [65]
97 Mouse
(Mus musculus)
40 [66]
98 Mango
(Mangifera indica)
40 [22]
99 Hyena
(Hyaenidae)
40
100 Ferret
(Mustela furo)
40
101 European polecat
(Mustela putorius)
40
102
American beaver

(Castor canadensis)
40
103 Peanut
(Arachis hypogaea)
40 Cultivated peanut is an allotetraploid (2n = 4x = 40). Its closest relatives are the diploid (2n = 2x = 20).[67] [67]
104 Wolverine
(Gulo gulo)
42
105 Wheat
(Triticum aestivum)
42 This is a hexaploid with 2n=6x=42. Durum wheat is Triticum turgidum var. durum, and is a tetraploid with 2n=4x=28.[22] [22]
106
Rhesus monkey

(Macaca mulatta)
42 [68]
107 Rat
(Rattus norvegicus)
42 [69]
108
Oats

(Avena sativa)
42 This is a hexaploid with 2n=6x=42. Diploid and tetraploid cultivated species also exist.[22] [22]
109 Giant panda
(Ailuropoda melanoleuca)
42
110 Fossa
(Cryptoprocta ferox)
42
111 European rabbit
(Oryctolagus cuniculus)
44
112
Eurasian badger

(Meles meles)
44
113
Moon jellyfish

(Aurelia aurita)
44 [70]
114 Dolphin
(Delphinidae)
44
115
Arabian coffee

(Coffea arabica)
44 Out of the 103 species in the genus Coffea, arabica coffee is the only tetraploid species (2n = 4x = 44), the remaining species being diploid with 2n = 2x = 22.[71]
116 Reeves's muntjac
(Muntiacus reevesi)
46
117 Human
(Homo sapiens)
46 44
allosomic
(sex)
[72]
118 Olive

(Olea Europaea)

46
119 Nilgai
(Boselaphus tragocamelus)
46 [73]
120 Parhyale hawaiensis 46 [74]
121 Water buffalo (swamp type)
(Bubalus bubalis)
48
122 Tobacco
(Nicotiana tabacum)
48 Cultivated species
amphidiploid (2n=4x=48) evolved through the interspecific hybridization of the ancestors of N. sylvestris (2n=2x=24, maternal donor) and N. tomentosiformis (2n=2x=24, paternal donor) about 200,000 years ago.[75]
[75]
123 Potato
(Solanum tuberosum)
48 This is for common potato Solanum tuberosum (tetraploid, 2n = 4x = 48). Other cultivated potato species may be diploid (2n = 2x = 24), triploid (2n = 3x = 36), tetraploid (2n = 4x = 48), or pentaploid (2n = 5x = 60).[76] Wild relatives mostly have 2n=24.[22] [76]
124 Orangutan
(Pongo)
48
125 Hare
(Lepus)
48 [77][78]
126 Gorilla
(Gorilla)
48
127
Deer mouse

(Peromyscus maniculatus)
48
128 Chimpanzee
(Pan troglodytes)
48 [79]
129 Eurasian beaver
(Castor fiber)
48
130 Zebrafish
(Danio rerio)
50 [80]
131 Woodland hedgehogs
Erinaceus
48 [81]
132 African hedgehogs
Atelerix
48 [82]
133 Water buffalo (Riverine type)
(Bubalus bubalis)
50
134 Striped skunk
(Mephitis mephitis)
50
135 Pineapple
(Ananas comosus)
50 [22]
136 Kit fox
(Vulpes macrotis)
50
137 Spectacled bear
(Tremarctos ornatus)
52
138 Platypus
(Ornithorhynchus anatinus)
52 Ten sex chromosomes. Males have X1Y1X2Y2X3Y3X4Y4X5Y5, females have X1X1X2X2X3X3X4X4X5X5.[83] [84]
139
Upland cotton

(Gossypium hirsutum)
52 This is for the cultivated species
allotetraploid, 2n=4x=52). This species accounts for 90% of the world cotton production. Among 50 species in the genus Gossypium, 45 are diploid (2n = 2x = 26) and 5 are allotetraploid (2n = 4x = 52).[85]
[85]
140 Sheep
(Ovis aries)
54
141 Hyrax
(Hyracoidea)
54 Hyraxes were considered to be the closest living relatives of
sirenians
have been found to be more closely related to elephants.
[87]
142
Raccoon dog

(Nyctereutes procyonoides procyonoides)
54 This number is for common raccoon dog (N. p. procyonoides), 2n=54+B(0–4). On the other hand, Japanese raccoon dog (N. p. viverrinus) with 2n=38+B(0–8). Here, B represents B chromosome and its variation in the number between individuals.[88][89] [88]
143 Capuchin monkey
(Cebinae)
54 [90]
144
Silkworm

(Bombyx mori)
56 This is for the species mulberry silkworm, B. mori (2n=56). Probably more than 99% of the world's commercial silk today come from this species.[91] Other silk producing moths, called non-mulberry silkworms, have various chromosome numbers. (e.g. Samia cynthia with 2n=25–28,[92] Antheraea pernyi with 2n=98.[93]) [94]
145 Strawberry
(Fragaria × ananassa)
56 This number is
Fragaria × ananassa (2n = 8x = 56). In genus Fragaria, basic chromosome number is seven (x = 7) and multiple levels of ploidy, ranging from diploid (2n = 2x = 14) to decaploid (F. iturupensis, 2n = 10x = 70), are known.[95]
[95]
146 Gaur
(Bos gaurus)
56
147 Elephant
(Elephantidae)
56
148 Woolly mammoth
(Mammuthus primigenius)
58 extinct; tissue from a frozen carcass
149
Domestic yak

(Bos grunniens)
60
150 Goat
(Capra hircus)
60
151 Cattle
(Bos taurus)
60
152 American bison
(Bison bison)
60
153 Sable antelope
(Hippotragus niger)
60 [96]
154 Bengal fox
(Vulpes bengalensis)
60
155 Gypsy moth
(Lymantria dispar dispar)
62
156 Donkey
(Equus asinus)
62
157 Scarlet macaw
(Ara macao)
62–64 [97]
158 Mule 63 semi-infertile (odd number of chromosomes – between donkey (62) and horse (64) makes meiosis much more difficult)
159 Guinea pig
(Cavia porcellus)
64
160 Spotted skunk
(Spilogale x)
64
161 Horse
(Equus caballus)
64
162 Fennec fox
(Vulpes zerda)
64 [98]
163 Echidna
(Tachyglossidae)
63/64 63 (X1Y1X2Y2X3Y3X4Y4X5, male) and 64 (X1X1X2X2X3X3X4X4X5X5, female)[99]
164 Chinchilla
(Chinchilla lanigera)
64 [60]
165 Nine-banded armadillo
(Dasypus novemcinctus)
64 [100]
166 Gray fox
(Urocyon cinereoargenteus)
66 [98]
167 Red deer
(Cervus elaphus)
68
168 Elk (wapiti)
(Cervus canadensis)
68
169 Roadside hawk
(Rupornis magnirostris)
68 [101]
170 White-tailed deer
(Odocoileus virginianus)
70
171 Black nightshade
(Solanum nigrum)
72 [102]
172 Tropical blue bamboo
(Bambusa chungii)
64–72 [103]
173 Bat-eared fox
(Otocyon megalotis)
72 [98]
174 Sun bear
(Helarctos malayanus)
74
175 Sloth bear
(Melursus ursinus)
74
176 Polar bear
(Ursus maritimus)
74
177 Brown bear
(Ursus arctos)
74
178 Asian black bear
(Ursus thibetanus)
74
179 American black bear
(Ursus americanus)
74
180 Bush dog
(Speothos venaticus)
74
181 Maned wolf
(Chrysocyon brachyurus)
76
182
Gray wolf

(Canis lupus)
78
183 Golden jackal
(Canis aureus)
78 [98]
184 Dove
(Columbidae)
78 Based on African collared dove [104]
185 Dog
(Canis familiaris)
78 Normal dog karyotype is composed of 38 pairs of [107]
186 Dingo
(Canis familiaris)
78 [98]
187 Dhole
(Cuon alpinus)
78
188 Coyote
(Canis latrans)
78 [98]
189 Chicken
(Gallus gallus domesticus)
78
190 African wild dog
(Lycaon pictus)
78 [98]
191
Tropical pitcher plant

(Nepenthes rafflesiana)
78 [36]
192 Turkey
(Meleagris)
80 [108]
193 Sugarcane
(Saccharum officinarum)
80 This is for
octoploid, 2n = 8× = 80).[109] About 70% of the world's sugar comes from this species.[110] Other species in the genus Saccharum, collectively known as sugarcane, have chromosome numbers in the range 2n=40–128.[111]
[109]
194
Pigeon

(Columbidae)
80 [112]
195 Azure-winged magpie
(Cyanopica cyanus)
80 [113]
196 Great white shark
(Carcharodon carcharias)
82 [114]
197
Bloody geranium

(Geranium sanguineum)
84 [115]
198 Moonworts
(Botrychium)
90
199
Grape fern

(Sceptridium)
90
200 Pittier's crab-eating rat
(Ichthyomys pittieri)
92 Previously thought to be the highest number in mammals, tied with Anotomys leander. [116]
201 Prawn
(Penaeus semisulcatus)
86–92 [117]
202 Aquatic rat
(Anotomys leander)
92 Previously thought to be the highest number in mammals, tied with Ichthyomys pittieri. [116]
203 Kamraj (fern)
(Helminthostachys zeylanica)
94
204 Crucian carp
(Carassius carassius)
100 [118]
205
Red viscacha rat

(Tympanoctomys barrerae)
102 Highest number known in mammals, thought to be a tetraploid[119] or allotetraploid.[120] [121]
206 Walking catfish
(Clarias batrachus)
104 [122]
207 American paddlefish
(Polyodon spathula)
120 [123]
208
Limestone fern

(Gymnocarpium robertianum)
160 Tetraploid (2n = 4x = 160) [124]
209
African baobab

(Adansonia digitata)
168 Also known as the "tree of life". 2n = 4x = 168 [125]
210 Northern lampreys
(Petromyzontidae)
174 [126]
211
Rattlesnake fern

(Botrypus virginianus)
184 [127]
212 Red king crab
(Paralithodes camtschaticus)
208
213
Field horsetail

(Equisetum arvense)
216
214
Agrodiaetus
butterfly
(Agrodiaetus shahrami)
268 This insect has one of the highest chromosome numbers among all animals. [128]
215
Black mulberry

(Morus nigra)
308 Highest ploidy among plants, 22-ploid (2n = 22x = 308)[129] [130]
216 Atlas blue
(Polyommatus atlantica)
448–452 2n = c. 448–452. Highest number of chromosomes in the non-
eukaryotic organisms.[131]
[131]
217 Adders-tongue
(Ophioglossum reticulatum)
1260 n=120–720 with a high degree of polyploidization.[132] Ophioglossum reticulatum n=720 in hexaploid species, 2n=1260 in decaploid species.[133]
218 Ciliated protozoa
(Tetrahymena thermophila)
10 (in micronucleus) 50x = 12,500 (in macronucleus, except minichromosomes)
10,000x = 10,000 (macronuclear minichromosomes)[134]
219 Ciliated protozoa
(Sterkiella histriomuscorum)
16,000[135] Macronuclear "nanochromosomes"; ampliploid. MAC chromosomes × 1900 ploidy level = 2.964 × 107 chromosomes [136][137][138]
  • Karyotype of a human being. It shows 22 homologous autosomal chromosome pairs, both the female (XX) and male (XY) versions of the two sex chromosomes, as well as the mitochondrial genome (at bottom left). Further information: Karyotype
    autosomal chromosome pairs, both the female (XX) and male (XY) versions of the two sex chromosomes, as well as the mitochondrial genome (at bottom left).
  • Fusion of ancestral chromosomes left distinctive remnants of telomeres, and a vestigial centromere. As other non-human extant hominidae have 48 chromosomes it is believed that the human chromosome 2 is the result of the merging of two chromosomes.[139]
    Fusion of ancestral chromosomes left distinctive remnants of
    human chromosome 2 is the result of the merging of two chromosomes.[139]

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Further reading

External links