Transgenic Organisms Can Help Clarify Which Gene May Be Responsible

Multiple Choice

Transgenic organisms can help clarify which gene may be responsible for a particular phenotype since

A) individuals with the phenotype frequently carry other mutations as well.
B) the genes that cause disease are always dominant.
C) the genes that cause diseases are always recessive.
D) strains used to create transgenic organisms carry no mutatins all their genes are wild-type.