| A | B |
|---|
| Congenic Strain | This is entirely one inbread strain except for a small sequence or mutation from another strain |
| Phenocopy | A mouse who looks like a mutant due to enviromental influences |
| Spontanious | A ________ mutation occurs haphazardly |
| Phenotypic Variation | This has occured when two genetically identical mice look different |
| Trait | Quantitive _______ Loci |
| Agregation Chimera | Combining two eairly embrios (blastocysts) into one developing embryo |
| Pronuclear DNA Injections | These result in a transgenic mouse |
| Point | The most common mutation occuring in JRS colonies |
