Question

in a group of muskmelon plants, some individuals have sour fruit and others have sweet fruit. in this group, the gene for the fruit taste trait has two alleles. the allele f is for sour fruit, and the allele f is for sweet fruit. a certain muskmelon plant from this group has sweet fruit. this plant has two alleles for sweet fruit. based on this information, click the blue words to correct any errors in the text. this muskmelon plant’s phenotype for the fruit taste gene is ff. this muskmelon plant’s phenotype for the fruit taste trait is sweet fruit. this muskmelon plant is heterozygous for the fruit taste gene.

Explanation:

1. The genotype of the plant with sweet - fruit (two alleles for sweet fruit) is $ff$. The term "phenotype" refers to the observable characteristic, which is sweet fruit, not the genetic makeup $ff$. So the first statement is wrong.
2. The second statement is correct as the observable trait (phenotype) of the plant for fruit taste is sweet fruit.
3. A heterozygous plant has two different alleles ($Ff$). Since this plant has two identical alleles ($ff$), it is homozygous, not heterozygous. So the third statement is wrong.

Answer:

• This muskmelon plant’s phenotype for the fruit taste gene is $ff$. (Incorrect, should be "This muskmelon plant’s genotype for the fruit taste gene is $ff$")
• This muskmelon plant’s phenotype for the fruit taste trait is sweet fruit. (Correct)
• This muskmelon plant is heterozygous for the fruit taste gene. (Incorrect, it is homozygous)