Question

The phenotypic ratio of Mendel's monohybrid cross for height in pea plants in $F_2$ generation was 3 : 1. The ratio indicates

• A. 70% tall and 30% dwarf plants
• B. 60% dwarf and 40% tall plants
• C. 75% tall and 25% dwarf plants
• D. 75% dwarf and 25% tall plants

Answer 1

The correct option is C 75% tall and 25% dwarf plants

The phenotypic ratio of Mendel's monohybrid cross for height in pea plants in $F_2$ generation was 3 : 1, where 3 represents tall plant and 1 represents dwarf plant. In percentage, tall plants are 75% and dwarf plants are 25%. This can be understood through the following calculation.
Ratio = 3 : 1
$\Rightarrow \frac{3}{4}\times 100=75$
$\Rightarrow \frac{1}{4}\times 100=25$