Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in running through a maze. They were trained by giving them a mild electric shock whenever they took a wrong turn. Immediately after each learning session, one group of mice was fed, but the other was not, A week later, all of the mice were tested to see whether they could still run the maze correctly. The group that had been fed had retained this ability, but the other group had not. The probable reason that the scientists used only mice from the same pure-bred strain is so that?

Genetic factors would be controlled to some extent.

scientests have to be safe

The scientists likely used mice from the same purebred strain to minimize genetic variations among the mice. By using mice from the same purebred strain, they can ensure that any differences in learning ability or behavior observed between the groups can be attributed to the food manipulation and not genetic differences.

Using mice from the same purebred strain helps to control for genetic factors that could influence learning ability. It reduces the likelihood that differences in maze-running performance are due to genetic variations between the mice, allowing the scientists to focus on the effects of food deprivation and feeding on learning retention.

By keeping the genetic background consistent, the researchers can be more confident in their conclusions regarding the effect of food on learning ability. It helps to establish a more controlled experimental environment where the only significant difference between the two groups of mice is their food intake, which allows for a clearer interpretation of the results.