Geneticists map ancient human movements using ____.

A) Denisovan genes
B) Neanderthal genes
C) maternal and paternal genetic markers
D) eye color trends
E) unique "dead end" genetic markers

Maternal and paternal genetic markers are used to track ancient human movements because these markers are passed down through generations and can provide information about the origins and migrations of populations. Denisovan and Neanderthal genes are also useful in studying human evolution and migrations, but they specifically indicate interbreeding with these ancient hominids rather than movement of human populations. Eye color trends and unique "dead end" genetic markers are not typically used in this type of analysis.