The answer would be A because The Modern Synthesis describes the fusion (merger) of Mendelian genetics with Darwinian evolution that resulted in a unified theory of evolution.
A. Darwin's theory of evolution and Mendel's ideas of heritability
Explanation:
Modern synthesis is the theory of evolution that combines Darwin's theory of natural selection and principles of Mendelian inheritance. This was done to explain the origin of variations among individuals in the population as proposed by Darwin. Darwin could not explain how variations were created and how these variations were transmitted to future generations. Mendel's laws of inheritance provided an explanation of the basis of the origin of variations and mode of their transmission.
