जनसंख्या में जीन आवृत्तियों में परिवर्तन के परिणामस्वरूप विभिन्न साधनों का वर्णन करें। (Describe various means which result in change in gene frequencies in a population.) (UPSC 2023,15 Marks,)

Describe various means which result in change in gene frequencies in a population.