The presence in diploid species of cells carrying multiple 2n genomes is identified as____________________?
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Answer: C. End polyploidy
Explanation
Endopolyploidy describes cells within diploid organisms replicating their nuclear DNA without subsequent cell division. This specialized cellular process leads to somatic cells carrying multiple complete copies of the genome. The condition occurs internally in specific tissues without changing the overall ploidy of the organism. Ploidy refers to the number of complete sets of chromosomes found in a biological cell. Diploid species normally maintain two sets of chromosomes in their standard somatic cells. Endoreduplication is the underlying cellular mechanism responsible for generating endopolyploid tissues.
Endopolyploidy frequently occurs in metabolically active tissues like mammalian liver and plant endosperm cells. Higher DNA content in these specialized cells often supports increased synthetic and metabolic activity rates. Researchers study these chromosomal variations to understand cellular differentiation and plant growth development. Allopolyploids contain multiple sets of chromosomes derived from different distinct species through hybridization. Amphidiploids are polyploids that behave like diploids during meiosis due to distinct ancestral genomes. Aneuploidy involves the presence of an abnormal number of individual chromosomes rather than whole genomes.
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- Agriculture
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- Agriculture
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- medium
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