Segregation of ray pattern phenotypes in C. briggsae RILs. a) Scatter plot comparing frequencies of derived character states for the position of ray 3 (Y-axis) and fusion of rays 3 and 4 (X-axis) in RILs. Each point represents an individual strain for which a minimum of 100 sides were scored for ray pattern. Parental strains, AF16 and HK104 represented by red square and red diamond, respectively. RILs represented by closed circles. Correlation coefficient, r, for ray position and fusion equaled 0.80. b) Frequency distributions for derived character states of ray 3 position (black bars) and ray 3–4 fusion (red bars) among RILs.