Expression of the Adh genes in fertile transgenic plants. RT-PCR analysis of the Adh transcripts in T1 plant numbers 5 and 7. The symbols −/−, −/+, and +/+ indicate the targeted homozygote (adh2∷hpt/adh2∷hpt), the heterozygote (adh2∷hpt/Adh2), and the wild type (Adh2/Adh2), respectively, and other symbols are as described in Figure 2B.