Figure 1 of
Burt, Mol Vis 2003;
9:164-170.
Figure 1. Electroretinographs of rdd heterozygous male and hemizygous female birds
Heterozygous 3-week-old male birds (rdd/+) have a normal ERG (A), whereas their age-matched hemizygous female siblings (rdd/-) showed complete absence of an ERG response (B).