Topic summary
Heterogamous
Extracted from the Wikipedia article Heterogamy.
Biology
In biology, heterogamy is sexual reproduction in which two types of gametes fuse, these gametes are usually of varying sizes, forms, and biological functions. This type of heterogamy occurs for example in some aphids. Alternately, heterogamy or heterogamous is often used as a synonym of heterogametic, meaning the presence of two unlike chromosomes in a sex.