Home › NEET UG › Biology › Principles of Inheritance and Variation › In Mendel's monohybrid cross between true-breedi…
In Mendel's monohybrid cross between true-breeding tall (TT) and dwarf (tt) plants, the F₂ phenotypic ratio was:
A9:3:3:1
B1:2:1
C1:1
D3:1 (tall:dwarf)
Answer & Solution
Correct answer: D. 3:1 (tall:dwarf)
F₂ phenotypic ratio in a monohybrid cross = **3 tall : 1 dwarf**. Genotypic ratio = **1 TT : 2 Tt : 1 tt**. The 3:1 includes the heterozygotes Tt that look tall (dominance).
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:In a monohybrid cross of Tt × Tt, the F2 PHENOTYPIC ratio is: