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 (g). this punnett square shows a cross between two watermelon plants. (punnett square with rows g, g and columns g, g, cells gg, gg, gg, gg) what is the expected ratio of heterozygous to homozygous dominant to homozygous recessive offspring genotypes? choose the most likely ratio. options: 0:4:0, 0:0:4, 4:0:0

Explanation:

Step1: Analyze Genotypes in Punnett Square

The Punnett square has four cells, all with genotype \( Gg \) (heterozygous). There are no \( GG \) (homozygous dominant) or \( gg \) (homozygous recessive) genotypes.

Step2: Determine the Ratio

Count the number of each genotype: heterozygous (\( Gg \)) = 4, homozygous dominant (\( GG \)) = 0, homozygous recessive (\( gg \)) = 0. So the ratio of heterozygous : homozygous dominant : homozygous recessive is \( 4:0:0 \).

Answer:

4:0:0