According to the most common evolutionary stable strategy (ESS), the ratio of males to females in a population is ____.

Step-by-step solution

According to Fisher's principle, the most common evolutionary stable strategy (ESS) for the sex ratio in a population is 1:1 . If one sex becomes less common, it will have a reproductive advantage, leading to increased production of that sex until the ratio balances out again. Thus, the stable ratio of males to females is equal. Among the given options, 1000 : 1000 represents the 1:1 ratio. Answer: 1000 : 1000