Home › UP Board Class 12 › biology › Principles of Inheritance and Variation › In a monohybrid cross of Tt × Tt, the F2 PHENOTY…
In a monohybrid cross of Tt × Tt, the F2 PHENOTYPIC ratio is:
A$1:2:1$
B$9:3:3:1$
C$3:1$
D$1:1$
Answer & Solution
Correct answer: C. $3:1$
Monohybrid F2 phenotypic ratio = 3:1 (3 dominant : 1 recessive). Genotypic ratio is 1:2:1 (TT:Tt:tt). 9:3:3:1 is dihybrid F2; 1:1 is test cross result.
Related questions
Haemophilia and colour blindness are MORE COMMON in MALES than females because they are:Down syndrome is most commonly caused by:Sickle cell anaemia is caused by:The sex of a human baby is determined by:In the human ABO blood group system, a person with blood group AB has the genotype:In snapdragon (Antirrhinum), RR (red) × rr (white) gives F1 plants that are PINK. This patIn a DIHYBRID cross of YyRr × YyRr, the F2 phenotypic ratio is:Mendel conducted his classic genetics experiments using: