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Commonly confused
Monohybrid vs dihybrid cross
Same idea, alag size: monohybrid cross ek trait follow karta hai, dihybrid do ek saath. Ratios inhe pehchaan dete hain.
Monohybrid cross
Ek trait, ek gene pair. F₁ same dikhte hain; F₂ aate hain 3 : 1 look me (1 : 2 : 1 genotype me). Example: tall × short.
Dihybrid cross
Do traits saath, do gene pairs. F₂ aate hain 9 : 3 : 3 : 1 me jab genes apne aap alag hote hain. Example: round-yellow × wrinkled-green.
Trap yeh hai
Ratios ko mix karna common galti hai: 3 : 1 monohybrid hai, 9 : 3 : 3 : 1 dihybrid. Quick check: 9 : 3 : 3 : 1 bas do 3 : 1 crosses ka multiplication hai. Chaar look-types matlab dihybrid; do look-types matlab monohybrid.
Ek quick check
9 : 3 : 3 : 1 ka F₂ look ratio batata hai ki cross tha:
- AMonohybrid
- BDihybrid
- CA test cross
- DIncomplete dominance