kromosomidoublen
Kromosomidoublen is a hypothetical genetic concept describing the complete duplication of an organism's chromosomal complement, resulting in whole-genome doubling (polyploidy). The term combines elements related to chromosomes and doubling to denote a state where the entire chromosome set is duplicated rather than only parts of the genome.
Definition and scope: In this concept, an organism experiences a doubling of its entire chromosome complement,
Mechanisms: Kromosomidoublen can arise through endoreduplication, where the nucleus duplicates its DNA without cell division; through
Occurrence and significance: Whole-genome duplications are well documented in plants and occur in certain animal lineages,
Biological implications: Genome doubling alters gene expression patterns and epigenetic landscapes, often requiring reorganization of regulatory
See also: polyploidy, endoreduplication, genome duplication, speciation.