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 dull fruit (f) is dominant over the allele for glossy fruit (f). the punnett square below shows a cross between two cucumber plants. consider the phenotypes and genotypes of the offspring shown. select all the boxes that represent offspring with a heterozygous genotype that have dull fruit. (punnett square with f, f on top; f, f on left; boxes with ff, ff, ff, ff)

Explanation:

Step1: Define Heterozygous Genotype

A heterozygous genotype has two different alleles, so here it's \( Ff \) (since \( F \) and \( f \) are different).

Step2: Check Phenotype (Dull Fruit)

The dominant allele \( F \) (from \( Ff \)) means the phenotype is dull fruit (as \( F \) is dominant over \( f \)).

Step3: Identify Boxes with \( Ff \)

Looking at the Punnett square, all four boxes have \( Ff \) (top - left: \( Ff \), top - right: \( Ff \), bottom - left: \( Ff \), bottom - right: \( Ff \)). All these \( Ff \) genotypes will show dull fruit (due to dominant \( F \)).

Answer:

All four boxes (top - left \( Ff \), top - right \( Ff \), bottom - left \( Ff \), bottom - right \( Ff \)) represent offspring with a heterozygous genotype (\( Ff \)) and dull fruit.