Packet 12: Tossup 6

This process can follow a “sliding boundaries” or “fading borders” model in basal members of one taxon. Competing coincidence models disagree on how one gene is regulated during this process, which is boundary-regulated by cadastral genes. In this process, signaling from the G·I-CONSTANS-F·T pathway induces SOC·1 to activate L·F·Y, leading to the upregulation of the homeotic genes A·P·2, A·P·3, P·I, and AGAMOUS. Trimethylation of the (*) F·L·C locus represses this process during vernalization. Organ identity assignment during this process, (10[1])which can be categorized as “short day” or “long day,” can be predicted using the ABC model. For 10 points, name this process in which angiosperms develop reproductive tissues such as stamens and petals. ■END■

Back to tossups

Buzzes

Summary