Imagine that you cross two strains of beef cattle | Homework Help

Imagine that you cross two strains of beef cattle. The red cattle had an average body weight of 800 + 60 (mean + variance) pounds, while the brown cattle had an average body weight of 620 + 40 pounds. Imagine both these strains of potatoes are homozygous for all the gene alleles that influence body weight in cattle, and all the genes that influence body weight in cattle exert equal and aIDitive effects on body weight. 2A. What do you expect the mean and variance of body weight to be in the F1 offspring? 2B. If you cross the F1 offspring with each other, what do you expect the mean and variance of body weight to be in the F2 offspring? (Give me the variance in general terms-you can’t give me a specific number from what I have given you.) 2C. If you backcross a number of the F1 offspring to a number of the red parents, what do you expect the mean and variance of body weight to be in the F2 offspring? (For the variance, just compare their variance to that of the red parents, the F1 generation, and the F2 generation from question 5B.) 2D. Imagine you cross several of the F1 offspring with each other, and get a mean + variance = 700 + 120 for body weight in the F2 offspring. How many genes influence body weight in your cattle? Round your calculated number to the nearest whole number.