Final answer:
Culture can evolve through the introduction of new genetic material, which can lead to evolutionary changes within a population over time.
Step-by-step explanation:
Culture can indeed evolve, despite not being directly impacted by an individual's genetic background. While genes do not change within an individual over time, genetic variation within populations is influenced by culture through migration patterns and cultural rules of sexual selection. Genes can be introduced to a population through interactions with other populations, such as through migration and cultural exchange. This introduction of new genetic material can lead to evolutionary changes within a population over time.