heterogamy

詳細解釋：

het.er.og.a.my

n.（名詞）
Alternation of sexual and parthenogenic generations, as in some aphids.
世代交替：雙性與單性生殖交替進行，如一些蚜蟲中
The state or condition in which conjugating gametes are dissimilar in structure and size as well as in function.
配子異型：配合配子在結構與大小及功能上不同的狀態或情況

【引伸】
het.erogam.ic