You have three strains of mice:
A,B,and C.You experimentally manipulate each strain and find that all three show increased secretion of molecule X.Now you perform a parabiosis experiment with the three combinations of these mice:
AB,AC,and BC.You perform the same experimental manipulation as above on one mouse of each pair without directly affecting the other mouse and look for effects on the other mouse.You find no detectable effect on the unmanipulated partner in any of the combinations.What is the logical conclusion based on these results?

Question

Quizplus · Accepted Answer

The effect on molecule X is not mediated by hormones.The parabiosis experiment shows that the effect on molecule X is not mediated by hormones because the unmanipulated partner in each pair does not show any detectable effect. This means that the effect is not due to a circulating hormone that is produced by the manipulated mouse and then travels to the unmanipulated mouse.

You Have Three Strains of Mice