Commonly confused
Genotype vs phenotype
Ek hai wo gene code jo organism rakhta hai. Doosra hai wo code kaisa dikhta hai. Dono jude hain, par same nahi.
Genotype
Wo alleles jo organism rakhta hai, letters me: TT, Tt, ya tt. Ye instruction hai, chahe dikhe ya na dikhe. TT aur Tt alag genotypes hain.
Phenotype
Wo trait jo tumhe dikhta hai: tall ya short. TT aur Tt pea plants ka phenotype same hota hai (tall), bhale hi unke genotypes alag hon.
Trap yeh hai
Main baat: ek hi phenotype ek se zyada genotypes se aa sakta hai. Ek tall plant TT ho sakta hai ya Tt, aur dekh kar nahi bata sakte. Isiliye test cross hota hai. Agar sawaal poochhe ki tall phenotype kitne genotypes se aata hai, answer do hai, ek nahi.
Ek quick check
Ek tall pea plant dikhta hai. Iska phenotype ‘tall’ hai. Iska genotype ho sakta hai:
- ASirf TT
- BSirf tt
- CTT ya Tt
- DSirf Tt