Final answer:
The evolution of our genus, Homo, included several species with Homo erectus being one of the important extinct species. Bipedalism evolved earlier than the development of large brain size, and Neanderthal culture was not primitive but rather complex.
Step-by-step explanation:
The correct statement about the evolution of our genus, Homo, is that several earlier species of Homo existed but have since gone extinct, including the species Homo erectus. The genus Homo is very diverse and includes many species that have contributed to the line of evolution that leads to our own species, Homo sapiens, which is currently the only living species within this genus. Fossil records and anatomical features confirm that bipedalism, or the ability to walk on two legs, preceded the development of large brain size and is one of the key characteristics of the genus Homo.
Choosing from the provided statements, the ones regarding other species of Homo, walking on two legs preceding large brain size, and the nature of Neanderthal culture are more accurate reflections of the evolutionary history of the genus Homo than those that reference an exclusive evolution of Homo sapiens or fossils dating to the age of dinosaurs, which are incorrect.