MCQ
Recombination of genes occur at:
- ✓Prophase $I$ in meiosis.
- BProphase $II$ in meiosis.
- CMetaphase $II$ in meiosis.
- DProphase in mitosis.
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$R :$ Descending limb is impermeable to $Na^+$, while ascending limb is impermeable to $H_2O.$