Gene Knockout

Q. What is a knockout mouse?

1. Mouse with low stamina to physical exertion
2. Mouse with a gene removed from its genome
3. Mouse that gets knocked out when high decibel sound is used near it
4. None of the above

Q.

A transgenic mouse that has the one specific desired gene disrupted is called

1. knock out mice

2. clone

3. chimera

4. surrogate