A Scientist Might Create a Conditional Knockout of a Mouse

Multiple Choice

A scientist might create a conditional knockout of a mouse gene when

A) a homozygous loss-of-function mutation in the gene causes embryonic lethality.
B) a homozygous loss-of-function mutation in the gene produces a wild-type phenotype.
C) a homozygous loss-of-function mutation in the gene affects only ears.
D) a homozygous loss-of-function mutation in the gene affects only coat color.