14. Genetic Control of Development
Early Developmental Steps
3:01 minutes
Problem 25
Textbook Question
Textbook QuestionDipterans (two-winged insects) are thought to have evolved from a four-winged ancestor that had wings on both T2 and T3 thoracic segments, as in extant butterflies and dragonflies. Describe an evolutionary scenario for the evolution of dipterans from four-winged ancestors. What types of mutations could lead to a butterfly developing with only two wings?
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