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Which one of the following statements is NOT correct regarding the tetrapod limb development? (1) As the limb grows outward, the stylopod forms first, then the zeugopod and the autopod […]

Homeobox transcription factor (Hox proteins), play important roles in specifying whether a particular mesenchymal cell will become stylopod, zeugopod or autopod. Based on the expression patterns of these genes, a […]

When a wrist blastema from a recently cut Axolotl forelimb is placed on a host hindlimb cut at the mid thigh level, it will generate only a wrist. The host […]

The programmed cell death that separates the digits during a tetrapod limb development is dependent on which one of the following signaling pathways? (1) BMP (2) FGF (3) Wnt (4) […]

Which of the following is true about amphibian limb regeneration? (A) It requires a minimum number of functional nerves. (B) The blastema of an amputated limb, if transplanted in the […]

Dose-dependence of retinoic acid treatment supports the notion that a gradient of retinoic acid can act as a morphogen along the proximo-distal axis in a developing limb. Following are certain […]

What would be the effect of retinoic acid (RA) treatment on the ‘positional information’ of blastema cells present on the amputated newt limb? (1) RA will have no effect (2) […]