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.
An enhancer is surrounded by four genes (A, B, C, and D), as shown in
the accompanying diagram. An insulator lies between gene C and gene
D. On the basis of the positions of the genes, the enhancer, and the
insulator, the transcription of which genes is most likely to be stimulated
by the enhancer? Explain your reasoning.
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