Question

in a group of cucumber plants, some individuals have dull fruit and others have glossy fruit. in this group, the gene for the fruit sheen trait has two alleles. the allele for glossy fruit (f) is recessive to the allele for dull fruit (f). this punnett square shows a cross between two cucumber plants. what is the probability that a cucumber plant produced by this cross will have dull fruit?

Explanation:

Step1: Identify genotype for dull fruit

Dull fruit is expressed by the dominant allele $F$, so any genotype with at least one $F$ (here, all are $FF$) will have dull fruit.

Step2: Count total Punnett square outcomes

There are 4 total possible offspring genotypes in the square.

Step3: Count favorable outcomes

All 4 squares have the $FF$ genotype, which produces dull fruit.

Step4: Calculate probability

Probability = $\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} \times 100\%$
$\text{Probability} = \frac{4}{4} \times 100\% = 100\%$

Answer:

100%