Thorax 1 Thorax 2 Thorax 3 Head (leg)(leg) (leg and wing) Ab 1 Ab2 Tail 90 80 70

Question

Thorax 1 Thorax 2 Thorax 3 Head (leg)(leg) (leg and wing) Ab 1 Ab2 Tail 90 80 70 60 50 40 Wolverine Cyclops 20 10 100 % embryo length The graph above depicts the distribution of Wolverine and Cyclops proteins in the early embryo of the mosquito Summeris annoyingus. Which of the following is a conclusion that can be made from the graph above? Remember that the x-axis represents the length from the future anterior to posterior end. Wolverine probably activates genes required for proper posterior development. Neither Wolverine nor Cyclops is likely required for proper anterior-structure formation. A null cyclops mutant will likely not form wings. Wolverine is likely important for dorsal structure formation. Cyclops is clearly not a morphogen.

Explanation / Answer

A null cyclop mutant will not have cyclop protein and wings are not formed in absence of cyclop protein according to graph. Because it will require higher cyclop conc. Option C is correct.

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