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The proverb has the phrase: ' It is impossible to judge someone through appearance ', but there is a species of fish that likes to rely on the outward colors to fulfill their partners. Research shows that a color genetic change can make a fish have a lot of sexual partners or become dull, this finding is extremely important in biology.

According to a report published in the British journal BMC Evolutionary Biology on September 29, Japanese researchers conducted experiments on a Killifish fish. This fish has a lot of colors, in which brown is the majority, there are also a few that are orange and gray.

Observing that the color difference has decided on different cases when Killifish selects a mate, the orange fish is very much sought after by many other fish , while the gray fish can only be Find a partner of the same color.

Killifish fish (Photo: 4tropical-fish.com)

The researchers found that these two completely different cases are in fact only determined by one gene. This gene controls the amount of orange pigments, if mutations occur, this fish is likely to become gray and it will not attract mates.

If using artificial methods to make this gene too effective, can create very attractive orange fish, their colors will be very colorful and attract many partners to pursue. The orange fish that select partners often choose each other, which is not the case in other fish. Researchers believe that if this gene mutates for a long time, it will lead to the formation of new species.

The researchers say this is the first time a gene has been discovered that can simultaneously alter the secondary sexual characteristics and the mate's choice of mate. In the past, it was thought that evolutionary organisms were determined by many genes that interact with each other, but this result suggests that, perhaps, only one gene can occur, gradually forming other animals. together.