 In short a gamete is an egg cell (female gamete) or a sperm (male gamete).This is an example of anisogamy or heterogamy, the condition in which females and males produce gametes of different sizes (this is the case in humans; the human ovum has approximately 100,000 times the volume of a single human sperm cell).In contrast, isogamy is the state of gametes from both sexes being the same size and shape, and given arbitrary designators for mating type.