A group of scientists conducted an experiment on fishes to study how physical appearance (colouration) influence their evolution. Briefly speaking, they put the same number of males and females in two aquariums A and B (say, 500 females and 500 males in each container. Number doesn’t matter much). The container A has all coloured fishes, and container B has 500 coloured and 500 uncoloured (Have you ever seen guppy with no colour?) fishes. Then they allowed them for reproduction and continuously evaluated the number of coloured and uncoloured fingerlings (Fish offsprings) for several generations. What they found was this: Container A sustained the population almost the same, and the population in Container B got extinct. Continue reading “An evolutionary disadvantage: Few thoughts”