Plants and animals that lack color are commonly called albinos. In corn plants, green (G) is dominant to albino (g). A student
group crossed two corn plants that are heterozygous for color.
What is the GENOTYPIC ratio?
a
Ob
50% GG and 50% Gg
25% GG, 50% Gg, and 25% gg
50% green corn and 50% albino corn
25% albino corn and 75% green corn
Od

(B) 25% GG, 50% Gg, and 25% gg

Explanation:

Given:

Green is dominant and is coded by G

Albino is recessive and is coded by g

Two corn plants that are heterozygous for color are crossed.

The heterozygous condition of the plant would be Gg.

The cross is shown in the table attached.

According to the punnett square drawn,

The genotypic ratio is 1 : 2 : 1 (GG : Gg : gg)

                                 = 25% GG , 50% Gg , 25% gg

Phenotypic ratio = 3 : 1 ( green : albino)

                           = 75% green, 25% albino