A trait in garden peas involves the curling of leaves. A two-factor cross was made by crossing a plant with yellow pods and curling leaves to a wild-type plant with green pods and normal leaves. All Ft offspring had green pods and normal leaves. The F, plants were then crossed to plants with yellow pods and curling leaves. The following results were obtained:
117 green pods, normal leaves 115 yellow pods, curling leaves
78 green pods, curling leaves
80 yellow pods, normal leaves
A. Conduct a chi square analysis to determine if these two genes are linked.
B. If they are linked, calculate the map distance between the two genes. How accurate do you think this distance is?
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