Part 2: Monohybrid Cross. How much genotypic variation do you find in the randomly picked parents of your crosses? How much in the offspring? How much phenotypic variation? Is the ratio of observed phenotypes the same as the ratio of predicted phenotypes? Why or why not? Pool all of the offspring from your five replicates.
answer 2. The combine harvester, or simply combine, is a machine that harvests grain crops. The first harvesting machines were devised by Patrick Bell in Scotland and Cyrus Hall McCormick in the United States. McCormick invented his first reaper at the age of 22 and tested it in a neighbor's field in 1831.he first harvesting machines were devised by Patrick Bell in Scotland and Cyrus Hall McCormick in the United States. McCormick invented his first reaper at the age of 22 and tested it in a neighbor's field in 1831.
55 Years of Agricultural Evolution. We recently completed wheat harvest on our farm using two John Deere combines. After 20 years of sitting in a barn after purchase, we were able to get our John Deere model 45 combine up and running so it could participate in the action. I thought having a machine from the 1950s out in the field with our 2010 9670 STS would make for some great comparison photos.