3. While practicing social distancing, it’s good to still gooutside for a walk, bike ride, or observing nature. While going ona walk and making sure there is always at least 6 ft between youand others, you discover a new tree. In fact, you discover a wholeforest of this tree that grows ICE CREAM. Some trees grow pistachioice cream, and others grow chocolate peanut butter ice cream (toclarify, I mean chocolate ice cream with peanut butter in it…clearly superior to any vanilla with Reese’s mixed in). Some growgiant scoops of ice cream, and others grow small scoops of icecream. You can’t wait to capitalize on your discovery and start afarm of ice cream trees. But first, you want to figure out how thealleles for the ice cream flavor gene and the scoop size gene areinherited so that you can try to grow large scoops of both flavorsof ice cream. You figure out, by performing many crosses, that thechocolate peanut butter allele is dominant and the pistachio alleleis recessive. You also find that the large scoop allele is dominantand the small scoop allele is recessive. Now you want to figure outif the flavor gene and the scoop size gene are autosomally linked,or autosomally not-linked. You decide to cross a tree that ishomozygous dominant for both flavor and scoop size to a pistachiotree with small scoops. Use F/f for flavor and S/s for scoopsize.

a. What are the genotypes of the two trees in the parentalgeneration? (2 points)

b. Draw a Punnett square to indicate what the F2 generationwould be if the genes are autosomal linked.

c. Draw a Punnett square to indicate what the F2 generationwould be if the genes are autosomal not linked.

d. Your F1 trees produce 100 offspring. 75 of them are chocolatepeanut butter trees with large scoops of ice cream. 25 of them arepistachio trees with small scoops. What mode of inheritance do youthink is controlling flavor and scoop size, and why? (1 point forcorrect mode of inheritance, 1 point for explanation).