$A$ study found that children with light-coloured eyes are likely to have parents with light-coloured eyes. On this basis,can we say anything about whether the light eye colour trait is dominant or recessive? Why or why not?

(D) Let us assume that the trait for light-coloured eyes is represented by the allele $l$ and dark-coloured eyes by $L$.
If light eye colour is recessive,the genotype of the child must be $ll$. For the child to have $ll$ genotype,both parents must contribute an $l$ allele,meaning both parents must have at least one $l$ allele.
If light eye colour is dominant,the genotype of the child could be $LL$ or $Ll$. If the child is $LL$,both parents must have at least one $L$ allele.
Since the observation only states that children with light-coloured eyes have parents with light-coloured eyes,it does not provide enough information to determine if the trait is dominant or recessive. Both dominant and recessive traits can be passed from parents to offspring,and the presence of a trait in parents does not confirm its dominance or recessiveness without knowing the phenotypic ratios in the offspring of multiple generations.