This is actually very simple, because the white color makes it easy to see the effect of the experiment. If other colors are used, this effect is likely to be covered by the color of his body. That is to say, it is easy to be invisible to the normal naked eye, and it is easy to be ignored, which can easily affect the judgment of the experimental results. Therefore, for the convenience of observation and to try to eliminate the influence of the color of the experimental mice on the experimental results, white ones are chosen. .
And there is another normal factor, that is, white looks better. We have seen many people keep mice as pets. They basically choose white, and there are basically no other colors, so just take them. Black or yellow, to be honest, it's a little uncomfortable to look at, and some people may even have a fearful emotion in it, especially girls. If we do experiments, then this kind of emotional fluctuations must be more or less the same. It will affect the effect of the experiment, so when choosing small mice, you will definitely tend to choose the cuter white color.
Also, from the perspective of the market, white mice should be the majority, so when purchasing for laboratories, purchasers will try their best to choose white ones, and because most of the people who purchase them All use white mice, which also promotes breeding manufacturers to give priority to the production of white mice, so white mice are cheaper. If you want other colors, it is difficult to buy them on the market, and you may even have to contact the production manufacturer in advance. Reservation, so for the sake of saving money or time, priority will be given to the white mice. This has formed a cycle, causing few people to choose lab rats of other colors.