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.
![**Question:**
If a eukaryotic mRNA lacked a poly-A tail, where would the mRNA be located?
**Options:**
- A: Cytoplasm
- B: Endoplasmic reticulum
- C: Golgi apparatus
- D: Nucleus
**Discussion:**
Eukaryotic mRNA typically undergoes processing steps such as the addition of a poly-A tail, which is crucial for the stability and export of the mRNA from the nucleus to the cytoplasm. Without a poly-A tail, the mRNA would most likely remain in the nucleus as it would be less stable and may not be effectively transported to the cytoplasm. Thus, the correct answer is likely option D: Nucleus.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa066112e-0246-43b2-92d7-6b2e1d8c1da2%2F6e8ea1c7-53ec-400d-a714-e1a5550c0495%2Fvlkr8l5_processed.jpeg&w=3840&q=75)
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