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Figure 6 | Frontiers in Zoology

Figure 6

From: New developmental evidence supports a homeotic frameshift of digit identity in the evolution of the bird wing

Figure 6

Expression of HoxD10 and HoxD11 is posteriorly shifted in cyclopamine- treated HH31 wings. (a, b) HoxD10 and (c, d) HoxD11 expression continue to be absent in the development of a digit 1 morphology, despite the fact it develops from cells in a position that in control wings expresses these genes and develops a digit 2 morphology. The simultaneous shift of HoxD expression and morphology is also implied in the hypothesis of an evolutionary homeotic frameshift. Scale bars: a, d—1 mm.

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