Imagine that you are studying the control of B-globin gene expression in immature red blood cells (mature red blood cells contain B-globin protein, but lack a nucleus and, therefore, the B-globin gene). If you deleted a sequence of DNA outside the protein-coding region of the B-globin gene and found that this increased the rate of transcription, the deleted sequence likely functions as a(n) promoter. promoter-proximal element. enhancer. silencer. any of the above.

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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.