Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Epistasis experiments with rap. Examples of multiple R7 ommatidia (white circles) and normal ommatidia (red circles) are indicated. (A–C) Removing one copy of rap from sev.sev* causes a significant reduction in ommatidia with multiple R7 cells (P = 5.0 × 10−4). (D–F) Removing one copy of rl from sev.rapV12 causes a significant reduction in ommatidia with multiple R7 cells (rl10a, P = 1.5 × 10−4; rlM41A10, P = 3.0 × 10−4).
