Chromosome organization: curiosity in diversity DOI Creative Commons
U. C. Lavania

The Nucleus, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

This article attempts to apprise curiosities attendant in organizational diversity and behaviour of chromosomes from academic utilitarian prospective, pinpointing certain uncommon but unique features. The chromosomes, comprised DNA proteins are the major component nucleus Eukaryotes, wherein about 4 cm long fiber is compacted form a chromosome 1 µm diameter 10 length. Chromosomes have defined territories serve as continuum for sustenance heredity variation both at asexual sexual level realised through mitotic meiotic division, respectively. Notwithstanding above commonalities, plants animals significantly differ their cellular organization. animal cell lacks cell-wall owe dynamically organized well differentiated linkage groups with specific location repeat families, clear contrast where has well-defined family-based precise differentiation between groups. Curiously, plant systems offer planta opportunities realize incidence polyploidy, intergenomic hybridity genomic orientation, kinetochore function, de novo somatic diversity, polysomaty, endopolyploidy polyteny differentiating tissues, B that times become source variation, adaptation speciation. Drastic variations encountered form, number plants, ranging n = 2 Brachyscome dichromosomatica 320 Sedum suaveolens (Crassulaceae), family 120 Brassicaceae, genus 2–45 (Asteraceae)—in angiosperms; 720 ferns. However, size does matter decide can accommodate. One key realizations "genomics era" polyploidy ubiquitous all modern flowering genomes derived processes set motion by history repeated, episodic whole-genome doubling, or polyploidy. Viewpoints underway foresee dominance perennial herbs prominence auto-polyploids coming centuries if present global trend climate change continues given fast pace Anthropocene. when divergent diploid combined an allopolyploid genome, there instances genomic/genetic changes genome/chromosome elimination and/or gene silencing assuage hybrid stabilization. Whereas inactivation/elimination centromeric histones lead chromosome/genome elimination, spatial position partner largely relative centromeres facilitate fixation.

Язык: Английский

Chromosome organization: curiosity in diversity DOI Creative Commons
U. C. Lavania

The Nucleus, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

This article attempts to apprise curiosities attendant in organizational diversity and behaviour of chromosomes from academic utilitarian prospective, pinpointing certain uncommon but unique features. The chromosomes, comprised DNA proteins are the major component nucleus Eukaryotes, wherein about 4 cm long fiber is compacted form a chromosome 1 µm diameter 10 length. Chromosomes have defined territories serve as continuum for sustenance heredity variation both at asexual sexual level realised through mitotic meiotic division, respectively. Notwithstanding above commonalities, plants animals significantly differ their cellular organization. animal cell lacks cell-wall owe dynamically organized well differentiated linkage groups with specific location repeat families, clear contrast where has well-defined family-based precise differentiation between groups. Curiously, plant systems offer planta opportunities realize incidence polyploidy, intergenomic hybridity genomic orientation, kinetochore function, de novo somatic diversity, polysomaty, endopolyploidy polyteny differentiating tissues, B that times become source variation, adaptation speciation. Drastic variations encountered form, number plants, ranging n = 2 Brachyscome dichromosomatica 320 Sedum suaveolens (Crassulaceae), family 120 Brassicaceae, genus 2–45 (Asteraceae)—in angiosperms; 720 ferns. However, size does matter decide can accommodate. One key realizations "genomics era" polyploidy ubiquitous all modern flowering genomes derived processes set motion by history repeated, episodic whole-genome doubling, or polyploidy. Viewpoints underway foresee dominance perennial herbs prominence auto-polyploids coming centuries if present global trend climate change continues given fast pace Anthropocene. when divergent diploid combined an allopolyploid genome, there instances genomic/genetic changes genome/chromosome elimination and/or gene silencing assuage hybrid stabilization. Whereas inactivation/elimination centromeric histones lead chromosome/genome elimination, spatial position partner largely relative centromeres facilitate fixation.

Язык: Английский

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