Because mice reproduce sexually, even if this 1 is only female, it will not produce offspring, let alone males. I hope this is an IQ question, otherwise the person who asks the question will be too pure!

If you ask 1 a newborn female mouse that can reproduce normally, and the offspring of the mouse are all normal females, and they are all artificially inseminated, then you can calculate according to the idea of the topic.

The result will be more complicated and the graphic method will be clearer.

First generation: 0,0, 1, 1, 1, 1, 1;

Second generation: 0,0, 1, 2,3,4,5,6;

Three generations: 0, 0, 0, 1, 3, 6,10;

Four generations: 0, 0, 0, 0, 0, 0, 1 4;

The final result is that all the above figures add up to 12 plus 1, and the answer is 649.