Question

complete the sentence correctly below.
parents gg × gg would have a genotypic ratio of

Explanation:

Step1: Identify parental gametes

Parent 1 (GG) produces only $G$ gametes. Parent 2 (Gg) produces $G$ and $g$ gametes.

Step2: Set up Punnett square

$$\begin{array}{c|cc} & G & G \\ \hline G & GG & GG \\ g & Gg & Gg \\ \end{array}$$

Step3: Count genotypes

Count of $GG$ = 2, Count of $Gg$ = 2, Count of $gg$ = 0.

Step4: Simplify genotypic ratio

Divide counts by their greatest common divisor (2): $\frac{2}{2}:\frac{2}{2}:\frac{0}{2}$

Answer:

1 : 1 : 0
(or written as GG : Gg : gg = 1 : 1 : 0)