Evaluate sexual selection theory as an explanation of human relationships

There is supporting evidence for the role of sexual selection as a result of anisogamy. Buss et al (1989) carried out a survey of 10,000 adults in 33 countries. He asked questions relating to a variety of aspects relating to evolutionary theory, finding that females placed greater value on resource related characteristics and men valued good looks, chastity and youth more than females. This research supports the idea of anisogamy as the variation in sex cells means that females must invest more within their offspring, therefore they must be extra choosy to ensure they select the best partner; thus, supporting the idea of two types of sexual selection. As this research was conducted across cultures it also supports the idea that sexual selection is indeed biological and not primarily dependent upon culture.