Polyploidy - Wikipedia
网页Polyploidy is the result of whole-genome duplication during the evolution of species. It may occur due to abnormal cell division, either during mitosis, or more commonly from the failure of chromosomes to separate during meiosis or from the fertilization of …
Polyploidy | Definition, Examples, Types, & Facts | Britannica
网页Polyploidy, the condition in which a normally diploid cell or organism acquires one or more additional sets of chromosomes. Polyploidy arises as the result of total nondisjunction of chromosomes during mitosis or meiosis. Learn more about polyploidy in this article.
Polyploidy | Learn Science at Scitable - Nature
网页Polyploidy is the heritable condition of possessing more than two complete sets of chromosomes. Polyploids are common among plants, as well as among certain groups of fish and amphibians. For...
Polyploidy: a biological force from cells to ecosystems
网页Polyploidy (whole-genome duplication; WGD, see glossary), defined as having three or more sets of chromosomes, influences organisms in all clades of eukaryotic life and all levels of biological organization, from genes to cells to entire ecosystems (Fig. 1).
The evolutionary significance of polyploidy - Nature
网页2017年5月15日 · Polyploidy, or whole-genome duplication (WGD), is usually an evolutionary dead end. Although polyploidy is a frequent and recurrent phenomenon, the number of WGDs that have become established in...
Polyploidy: A Biological Force From Cells to Ecosystems - Cell Press
网页2020年7月6日 · Polyploidy, resulting from the duplication of the entire genome of an organism or cell, greatly affects genes and genomes, cells and tissues, organisms, and even entire ecosystems. Despite the wide-reaching importance of polyploidy, communication across disciplinary boundaries to identify common themes …
7.4: Polyploidy - Biology LibreTexts
网页2022年5月15日 · Cells (and their owners) are polyploid if they contain more than two haploid (n) sets of chromosomes; that is, their chromosome number is some multiple of n greater than the 2n content of diploid cells. For example, …
The advantages and disadvantages of being polyploid
网页2005年10月11日 · There are three obvious advantages of becoming polyploid: heterosis, gene redundancy (a result of gene duplication) and asexual reproduction. Heterosis causes polyploids to be more vigorous than...
Polyploidy as a Fundamental Phenomenon in Evolution, …
网页2022年3月24日 · Polyploidy, which results from whole-genome duplication, is a fundamental complement to vertical copying. Both organismal and cell polyploidy can emerge via premature cell cycle exit or via cell-cell fusion, the latter giving rise to polyploid hybrid organisms and epigenetic hybrids of somatic cells.
Polyploidy: an evolutionary and ecological force in stressful times
网页2020年12月1日 · Polyploidy has been hypothesized to be both an evolutionary dead-end and a source for evolutionary innovation and species diversification. Although polyploid organisms, especially plants, abound, the apparent nonrandom long-term establishment of genome duplications suggests a link with environmental conditions.