Phase of Cell Cycle in Which DNA Synthesis Occurs
DNA synthesis occurs in which phase of the cell cycle?
- S-phase — Correct Answer
- G₁-phase
- G₂-phase
- M-phase (Mitosis)
Explanation:
Correct Answer: S-phase
DNA replication/synthesis occurs during the S-phase (Synthesis phase) of interphase in the cell cycle.
Cell Cycle Phases
| Phase | Events |
|---|---|
| G₁ (Gap 1) | Cell growth; protein synthesis; preparation for DNA replication |
| S (Synthesis) | DNA replication — chromosome number doubles |
| G₂ (Gap 2) | Cell prepares for mitosis; organelle duplication |
| M (Mitosis/Meiosis) | Cell division |
Note: DNA replication takes place during Interphase (which includes G₁, S, G₂), specifically in the S-phase. Crossing over takes place during the pachytene stage of prophase-I of meiosis.
📚 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.
