Who has more DNA?

The C-value refers to the amount of DNA present in the nucleus of a haploid cell in eukaryotic organisms. The C-value paradox refers to the lack of a strict correspondence between a species' C-value and its biological complexity, meaning that the more complex the organism, the higher its DNA content. Current research suggests that the C-value paradox is largely related to non coding DNA. Natural selection is not a designer, it does not aim for the optimal economy that humans pursue. The emergence of the C-value paradox is the result of the interaction of multiple complex factors.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

The C-value paradox refers to the lack of a strict correspondence between the genomic DNA content (C-value) of a species and its evolutionary complexity. For example, the C-value of some lower organisms may be much higher than that of higher organisms, such as amoebas whose genome is 200 times larger than that of humans. This phenomenon is mainly related to the presence of a large amount of non coding DNA in the genome, which occupy the majority of the genome (such as introns, repeat sequences, and transposable elements) but do not directly participate in protein coding. In addition, the C-value paradox also suggests that genome size is not directly determined by the number of genes, but is significantly influenced by non coding DNA. Therefore, the complexity of organisms cannot be measured solely by DNA content or gene quantity, but should focus on the number and regulatory mechanisms of their functional genes.