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The list of organisms by chromosome count describes ploidy or numbers of chromosomes in the cells of various 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.
The natural habitats of this species are rivers and swamps. Its karyotype has 2n = 92 and FNa = 98. This was previously thought to be the highest chromosome number known for a mammal, [3] but it has since been found that the plains viscacha rat or red viscacha rat (Tympanoctomys barrerae) has 4x = 2n = 102. [4]
Euploidy and aneuploidy describe having a number of chromosomes that is an exact multiple of the number of chromosomes in a normal gamete; and having any other number, respectively. For example, a person with Turner syndrome may be missing one sex chromosome (X or Y), resulting in a (45,X) karyotype instead of the usual (46,XX) or (46,XY).
It has almost 1260 number of chromosomes in the meiocyte (spore mother cell) which undergo meiosis, the reduction division to form the spore with only one set of chromosomes getting incorporated into each spore. [5] The species Ophioglossum reticulatum has the highest number of chromosomes found in any multicellular organism. [6]
Number of chromosomes Number of genes predicted Organization Year of completion Arabidopsis thaliana Ecotype:Columbia: Wild mustard Thale Cress Model plant 135 Mb [10] 5 25,498, [11] 27,400, [12] 31,670 (UniProt) Arabidopsis Genome Initiative [13] 2000 [11] Cyanidioschyzon merolae Strain:10D: Red algae: Simple eukaryote: 16.5 Mb 20 5,331 [14]
Polyploidy is a condition in which the cells of an organism have more than two paired sets of chromosomes. Most species whose cells have nuclei are diploid, meaning they have two complete sets of chromosomes, one from each of two parents; each set contains the same number of chromosomes, and the chromosomes are joined in pairs of homologous ...
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
It would also be helpful to list the specific species of hyena used for its chromosome count, as it is highly unlikely for every member of Hyaenidae to possess the same chromosome number, considering the great evolutionary divergence each species underwent. — Preceding unsigned comment added by 70.30.110.233 19:45, 19 July 2019 (UTC)