Inevitability or contingency: how many chromosomes do we really need?

	Inevitability or contingency: how many chromosomes do we really need?
	Jiang, Shuangying; Dai, Junbiao
刊名	SCIENCE CHINA-LIFE SCIENCES
	2018
文献子类	期刊论文
英文摘要	In an essay written by the evolutionary biologist Theodosius Dobzhansky in 1973, he pointed out that “Nothing in Biology Makes Sense Except in the Light of Evolution.” An interesting phenomenon in biology is the presence of variable numbers of chromosomes in different organisms. Besides several species, which possess multiple circular chromosomes or simply linear chromosomes (Baril et al. 1989; Suwanto and Kaplan, 1989; Jumas-Bilak et al., 1998), most prokaryotes only possess one circular chromosome. In contrast, the genomes of eukaryotic species are usually packaged into linear chromosomes with numbers varying from one to hundreds (Crosland and Crozier, 1986; Lukhtanov, 2015). For instance, the male ant (Myrmecia pilosula), human (Homo sapiens), dog (Canis lupus familiaris), and atlas blue (Polyommatus atlantica) have 1, 46, 78, and approximately 450 chromosomes, respectively (Crosland and Crozier, 1986; Lindblad-Toh et al., 2005; Green et al., 2015; Lukhtanov, 2015). In fungal species with similar genome contents, the budding yeast Saccharomyces cerevisiae has 16 chromosomes (approximately 12 Mb) while the fission yeast Schizosaccharomyces pombe has only three chromosomes (approximately 14 Mb) (Goffeau et al., 1996; Wood et al., 2002). There might be lack of an obvious relationship between the number of chromosomes and their biological characteristics, which leads to numerous intriguing questions. For example, why is there such big variation in chro
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/13443]
专题	合成所
推荐引用方式 GB/T 7714	Jiang, Shuangying,Dai, Junbiao. Inevitability or contingency: how many chromosomes do we really need?[J]. SCIENCE CHINA-LIFE SCIENCES,2018.
APA	Jiang, Shuangying,&Dai, Junbiao.(2018).Inevitability or contingency: how many chromosomes do we really need?.SCIENCE CHINA-LIFE SCIENCES.
MLA	Jiang, Shuangying,et al."Inevitability or contingency: how many chromosomes do we really need?".SCIENCE CHINA-LIFE SCIENCES (2018).