Question

this passage describes the ground spot color trait in watermelon plants.
watermelon plants grow with their fruit resting on the ground. over time, the bottom of each fruit develops a white or yellow spot called a ground spot. in some types of watermelon plants, the color of the ground spot is an inherited trait.
in a group of watermelon plants, some individuals have a yellow ground spot and others have a white ground spot. in this group, the gene for the ground spot color trait has two alleles.
the allele for a white ground spot (g) is recessive to the allele for a yellow ground spot (c).
this punnett square shows a cross between two watermelon plants.
what is the expected ratio of homozygous recessive to homozygous dominant offspring genotypes? choose the most likely ratio.

Explanation:

Step1: Analyze the Punnett square

The Punnett square shows the offspring genotypes from a cross. The genotypes are \( GG\), \(Gg\), and \(gg\).

Step2: Determine homozygous dominant and recessive

Homozygous dominant is \(GG\) and homozygous recessive is \(gg\).

Step3: Count the number of each

Count the number of \(GG\) (homozygous dominant) and \(gg\) (homozygous recessive) in the Punnett square. There are 4 \(GG\) (homozygous dominant - let's assume \(G\) is dominant) and 4 \(gg\) (homozygous recessive).

Step4: Calculate the ratio

The ratio of homozygous dominant (\(GG\)) to homozygous recessive (\(gg\)) is \(\frac{4}{4}= 1:1\).

Answer:

\(1:1\)