5. A pea plant that is heterozygous at three loci that determine plant height, pod shape, and flower color was selfed. The progeny consisted of 272 tall, inflated pods, purple flowers; 92 tall, inflated, white flowers; 88 tall, flat pods, purple; 93 dwarf, inflated, purple; 35 tall, flat, white; 31 dwarf, inflated, white; 29 dwarf, flat, purple; 11 dwarf, flat, white. Which alleles are dominant in this cross? 7. In fungi, the synthesis of the amino acid arginine from the precursor citrulline requires two biochemical steps. In the first, citrulline is converted to L-arginino-succinate in a reaction catalyzed by an enzyme encoded by the ARGI gene. In the second step, L- arginino-succinate is converted to arginine in a reaction catalyzed by an enzyme encoded by the ARG4 gene. If a cross is performed between a strain that is homozygous for functional copies of both genes and a second strain that is homozygous for non-functional copies of both genes, the resulting Fl strain is capable of converting citrulline to arginine. If the FI strain is used to perform a dihybrid cross, what fraction of the offspring should be capable of surviving on a medium that contains citrulline but not arginine or L- arginino-succinate (assuming independent assortment)?