You perform a QTL to identify loci involved in controlling grain yield in wheat. You perform the crosses starting with true-breeding parental plants from two different populations (see information below) and collect data on offspring grain yield as well as multiple SNP markers. Based on these results, answer the questions below. Population Marker 1 Marker 2 Marker 3 Marker 4 Marker 5 Parent #1 population Parent plant #2 F1 Average Grain yield (grams) 64.2 12.4 38.1 G/G C/C G/C A/A G/G AG T/T AVA TIA C/C T/T CIT G/G C/C G/C You cross the F1s to generate an F2, and then let the F2s cross to generate an F3. Below are results from testing 10 of the F3 offspring plants. F3 Plant Marker 1 Marker 2 Marker 3 Marker 4 Marker 5 TIA 1 2 3 4 5 6 7 8 9 10 Grain yield (grams) 63.9 59.6 54.2 48.3 40.1 29.8 24.2 22.0 16.8 10.1 G/G G/G G/G G/C G/G C/C C/C C/C C/C C/C A/G G/G AIA A/G A/G A/G G/G A/A A/G A/G TIA AVA TIA AIA TIA TIA TIA TAT AVA C/T C/C T/T C/C TAT C/C C/T C/T C/T T/T G/G G/G G/G G/G G/C G/G C/C G/C C/C C/C A. 4 points. How many loci have been identified that may be involved in controlling grain yield? Explain your reasoning (be concise but very specific, referring to data that supports your answer): B. 4 points. What are at least two things you would want to do next if you were working on this research? List and briefly explain why you would want to do those things (what would you learn from this?) What to do next: Why/what would you learn from this? C. 2 points. Why do you think there are a variety of grain yield phenotypes in the F3 plants? Explain in 1-2 sentences.