The correct response to the student's claim is:
No, dominant traits in general tend to be less common in the population and continue to persist only because they are dominant over more common recessive alleles.
This is true because the frequency of a trait in a population is influenced by various factors, including environmental pressures, genetic drift, and mutation rates, rather than solely by whether a trait is dominant or recessive. Dominant traits are not necessarily more common; in fact, some dominant traits may exist in a population at a lower frequency than recessive traits.