Science and Technology · Agriculture & Animal Husbandry

With reference to assisted reproductive technologies used in livestock improvement, consider the following statements: I. In the OPU–IVF–ET technique, ova collected from genetically superior animals are fertilized outside the body before embryo transfer. II. Embryo transfer technology can enable rapid multiplication of desirable genetic traits in cattle and buffalo populations. III. Indigenous breeds such as Sahiwal cattle and Tharparkar cattle are primarily exotic breeds introduced into India for crossbreeding programmes. IV. Surrogate animals used in embryo transfer programmes need not necessarily possess the superior genetic characteristics of the donor animal. How many of the statements given above are correct?