In a typical Mendelian cross, which is a dihybrid cross, one parent is homoxygous for both dominant traits and another parent is homozygous for both recessive traits. In the `F_(2)` -generation, both parental combination and recombinantions appear. The phenotypic ratio of parental combinations to recombinations is

Options

A. `10:6`
B. `12:4`
C. `9:7`
D. `15:1`

Answer

A

Explanation

A cross of round yellow seeds (both dominant and greenwrinkled seeds(both recessive) plants produced 9:3:3:1 ratio of plants (phenotypic) in `F_(2)` -generation. The ratio of parental to recombinant is 10:6 here bacause the 9 and 1 are of parental type and 3 and 3 are recombinant type.