Comparison of the retinal phenotypes observed at 36 hpf in the two rb1 mutant alleles.

*rb1te226/ty85d embryos were generated from a cross between spcty85d heterozygotes and rb1te226a heterozygotes, and then genotyped for the presence of the rb1te226a allele. Of the genotyped rb1te226a heterozygotes, only half are expected to carry the spcty85d allele, thus reducing the total number of mutant retinas by half, and numbers for rb1te226/ty85d were adjusted accordingly.