MCQ
Diameter of pollen grain
- A$25-50$ $A^o$
- B$25-50$ micron
- C$20-25$ micrometre
- ✓$25-50$ micrometre
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.