As we know that those genes that are hard to detect using standard methods are known as Dark DNA. It is puzzling scientists for several months and after studying it thoroughly they have found something more about it.
The common thing we find about the definition of evolution in most textbooks is that evolution occurs in two stages. Mutation and natural selection following it; mutation do the first thing, it creates the variation in the DNA of an organism then the natural selection decides that should take it or not, and so biases the direction of evolution.
High mutations’ hotspot within a genome means that a particular location’s genes have a greater chance of having mutation than the other genes, which could be an unappreciated mechanism which could also prejudge the evolution’s direction. Which means that natural selection is not the only driving force.
The same mutation happened with birds as scientists found that about 274 genes are mission (or hidden) from currently sequenced bird genomes, which includes the gene for Leptin. Leptin is a hormone of energy expenditure and scientists couldn’t find it for many years.
Dark DNA appears to be present in two extremely distinct and diverse types of animals. But it is still unknown how much extensive it can be. Does every animal have Dark DNA? To know the answer, the best thing we can do is to study the effect of Dark DNA on animal evolution. In the bird’s example, the mutation might be so rapid that natural selection couldn’t catch it to remove detrimental things from the DNA. And if it is the fact then it indicates the detrimental mutation could show many more colors.