Phase of DNA Replication
In which phase of cell cycle, DNA Replication is takes place
- Interphase — Correct Answer
- Prophase
- Metaphase
- Anaphase
Explanation:
Correct Answer: Interphase
DNA Replication takes place during the S-phase (Synthesis phase) of Interphase in the cell cycle — before cell division begins.
Cell Cycle Phases
| Phase | Stage | Event |
|---|---|---|
| Interphase | G₁ phase | Cell growth; preparation for DNA synthesis |
| S phase | DNA Replication ✓ | |
| G₂ phase | Cell prepares for mitosis | |
| Mitosis (M phase) | Prophase | Chromosomes condense; spindle forms |
| Metaphase | Chromosomes align at equatorial plate | |
| Anaphase | Chromatids separate to poles | |
| Telophase | Nuclear envelope reforms |
Crossing Over — Related Fact
- Crossing over (exchange of segments between non-sister chromatids of homologous chromosomes) occurs in the pachytene stage of Meiosis-I.
- It is the 2nd biggest cause of genetic variation (after segregation).
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
