You are studying three linked genes in corn: leaf color, plant height, and leaf shape (each with two alleles showing complete dominance). The dominant allele A results in green leaves, aa plants have purple leaves. The dominant allele Dresults in tall plants; dd plants are dwarfed. The dominant allele results in ragged leaf margin; rr plants have smooth leaf margins. A triple heterozygote is test-crossed and the following phenotypes of progeny were observed. # of plants 265 140 90 Phenotype green, tall, ragged green, tall, smooth green, dwarf, ragged green, dwarf, smooth purple, tall, ragged purple, tall, smooth purple, dwarf, ragged purple, dwarf, smooth TOTAL 16 24 70 120 275 1000 1. 16 2. 20 3. 30 What is the distance between D and R? 4. 26 5. 50 What's the distance between A and R? 6. 54 What is the order of the genes? 7. RAD What is the distance between D and A? 8. RDA 9. ARD 10. ADR 11. DRA
