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 1: DNA Polymerase I
DNA pol I (DNA Polymerase I):
- is a single subunit enzyme
- has a 5' to 3' exonuclease activity
- has a 3' to 5' exonuclease activity
- all of the above
**Explanation:** In this multiple-choice question, you are asked about the characteristics of DNA Polymerase I. The options provided are:
1. DNA pol I is a single subunit enzyme.
2. DNA pol I has a 5' to 3' exonuclease activity.
3. DNA pol I has a 3' to 5' exonuclease activity.
4. All of the above (implying that DNA pol I possesses all these features).
**Note:** An exclamation mark symbol and a warning message are displayed at the top of the screen, stating, "⚠️ Moving to another question will...". The rest of the warning message is not visible in the provided image.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5382a60e-e4a7-49f2-aa78-01b9e78a4433%2Fb80a558e-4000-4cb6-9670-74fd0fc75060%2Fi86frf_reoriented.jpeg&w=3840&q=75)
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DNA polymerase progressively adds deoxyribonucleotides to the 3'OH end of the newly synthesised polypeptide chain.
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