Imagine you do a test cross between a purple -flowered pea plant having serrated leaves (both dominant traits) and a white-flowered pea plant having smooth edges. If the purple -flowered plant is heterozygous for both traits, the expected ratio in the offspring is 1 purple -serrated:1 purple-smooth:1 white-serrated:1 white-smooth. Instead, you see 7 purple-serrated:1 purple-smooth:1 white-serrated:7 white-smooth. What is the explanation of this ratio?
A) The genes are linked.
B) There is incomplete dominance.
C) The genes are sex-linked and inherited by incomplete dominance.
D) There has been a mutation during the cross.

Question

Quizplus · Accepted Answer

The observed ratio suggests that the genes for flower color and leaf shape are linked, meaning they are located close together on the same chromosome and tend to be inherited together, which deviates from the expected 1:1:1:1 Mendelian ratio for independent assortment.

Imagine You Do a Test Cross Between a Purple -Flowered