Final answer:
Anisogamy refers to an asymmetry in the size of gametes, with male gametes (sperm) typically being much smaller than female gametes (eggs). It is related to sexual dimorphism and influences reproductive strategies and behaviors in different species.
Step-by-step explanation:
Anisogamy refers to the condition where there is an asymmetrical size difference between the male and female gametes, which are the sex cells involved in reproduction. In anisogamous species, typically the male gamete (sperm) is much smaller than the female gamete (egg). This characteristic facilitates the diversity of sexual reproduction strategies and plays a role in the differences seen between males and females within certain species, known as sexual dimorphism.
Furthermore, anisogamy can be connected to various reproductive behaviors and choices, such as mate selection based on body size or fecundity, the influence of an individual's reproductive resource status on mating behavior, and the variations in prezygotic barriers like gametic compatibility.