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.
What transcriptional repressors do.
Transcription and translation are 2 steps involved in processing of DNA to proteins.
RNA molecule is copied as complementary with present DNA – this is called as transcription. Further in translation process, this mRNA is used as transcript to produce polypeptide.
Regulation of gene expression is necessary in order to save time and energy both. It requires lots of energy to express a gene , also requires space in cell. So, if cell continues to express every gene – it will be so big in size also will consume lot of time. Thus, cell expresses specific proteins at specific time.
This is achieved by 2 types of regulation : positive and negative gene regulation.
Step by step
Solved in 2 steps
