Which of the following statements about the expression of the repressor (lacl) gene in the lac operon is accurate? a) It is part of the control mechanism of the lacZ and lacy genes. b) It occurs only when RNA polymerase binds to the promoter. c) It results in the removal of the repressor from the operator. d) It occurs only when lactose is present.

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Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.