In developing his sex ratio theory, Sir Ronald A. Fisher assumed that sex ratio is under genetic control. Why is this an important assumption?

Question

Quizplus · Accepted Answer

This assumption is important because according to the principles of evolution, only traits that are under genetic control can evolve by natural selection. If sex ratio was not under genetic control and was, for example, entirely influenced by environmental factors, it would not be subject to the same mechanisms of evolution as other traits. Therefore, Fisher's assumption was crucial in establishing a framework for understanding the evolution of sex ratios.

In Developing His Sex Ratio Theory, Sir Ronald A