Mutants and transgenic models have played a pivotal role in understanding development. Which one of the following statements is true?
1
A transgenic DNA chimaera experiment involves the transplantation of cells from a genetically modified organism to another embryo.
2
Interspecies chimaera are the easiest and most common model systems to study developmental processes.
3
A transgenic female mouse (XX) expressing Sry (sex-determining region of the Y- chromosome) induces the production of Y-chromosome-carrying ovum in the mouse.
4
A transgenic animal model is exclusively utilized to study gene function by deletion of a gene.