the geneticist can study the inheritance pattern of hair color in mice, or certain cancers in humans, without any direct physical knowledge of what the gene actually is or does.
(the geneticist; can study; the inheritance pattern of hair color in mice, or certain cancers) (the gene; actually is; ) (the gene; does; )
the geneticist the gene the gene
can study actually is does
the inheritance pattern of hair color in mice, or certain cancers