(1) Transgenic technology is to transfer the gene of one organism to the organism in the genome of another organism and cultivate transgenic organisms. In this experiment, the rat growth hormone gene was introduced, and finally the super mouse was obtained. The shape of the super mouse is the result of the mouse growth hormone gene, which proves that the gene controls the characteristics of the organism.

(2) Morphological characteristics, physiological characteristics and behaviors of organisms are called traits, so the trait studied in this study is the individual size of rats, and the gene controlling this trait is rat growth hormone gene.

(3) Transgenic mice developed from fertilized eggs with rat growth hormone gene are 2-3 times faster and 65,438+0 times larger than mice born with siblings. The results show that the relationship between genes and traits is a trait controlled by genes.

(4) The fertilized eggs injected with rat growth hormone gene developed into super mice, while the fertilized eggs without rat growth hormone gene developed into normal mice. By comparison, we can know that the individual size (character) of mice is controlled by growth hormone gene. The results show that these traits are controlled by genes. In the process of biological transmission, genes controlling biological characters are passed down.

So the answer is: (1) transgenic technology; Gene; Genome; Transgenic; Gene;

(2) the individual size of rats; Rat growth hormone gene;

(3) Genetic control traits;

(4) Genes that control biological characters.