Final answer:
The statement that transgenic mice must have parents with the recombinant vector in all of their cells is B) FALSE. Transgenic organisms can be created by introducing a recombinant vector into the genome at an early developmental stage, and these changes can be passed on to offspring.
Step-by-step explanation:
The statement "Transgenic Mice expressing the phenotype of the Recombinant Vector in all of their cells must have had parents with the Recombinant Vector in all of their cells too" is FALSE. Transgenic mice are typically generated by introducing a recombinant vector into the genome of a single cell, such as a fertilized egg or embryonic stem cell, which then divides to give rise to a transgenic organism. If the modification is introduced at the embryonic stage and successfully incorporated into the germ line, the resulting transgenic mice can pass on the transgene to their offspring, even if the parents do not have the recombinant vector in all of their cells. This is a fundamental principle in genetic engineering, where specific genes are inserted, deleted, or modified within an organism's genome to express a desired trait.