Answer: Penetrance can be defined as an extent to which a particular gene or set of gene is expressed in the phenotype.
Explanation:
Sex-limited traits are those traits that can observed in organisms belonging to a particular sex or gender. For example, barred coloring in chicken are observable only in roosters.
Sex-linked traits are traits or genes that are carried by either sex chromosomes are sex linked traits. The traits is sickle cell anemia.
Sex-linked traits is of more penetrance, because the trait will be expressed by either sex chromosome X or Y.