Final answer:
A nurse assessing an infant with developmental dysplasia of the hip would anticipate unequal leg length, a condition that can be related to disruption in normal limb development and gene regulation during the embryonic stage. The correct answer is A: Unequal leg length.
Step-by-step explanation:
The student is asking about the findings a nurse would anticipate when assessing an infant with developmental dysplasia of the hip (DDH). Among the options provided, unequal leg length is a common clinical sign of DDH. The development of the limbs, including the appearance of the upper and lower limb buds and the flattening of the distal limb bud into a paddle shape, are critical stages in embryonic development influenced by various genes including Hox genes. A mutation in Hox genes can lead to developmental abnormalities such as abnormal body length or height and could manifest in limb malformations consistent with fewer appendages, which is related to skeletal development issues like DDH.