Radiographic analysis for 9-month-old <i>R26^floxneoWnt4</i><i>; Col2a1-Cre</i> mutants.

<p>The mutants had a smaller skeleton, abnormal skulls with a domed vault (arrowhead) and protruding incisors (small arrow). Kyphosis (large arrow) of the cervical-thoracic spine was also observed in the mutants. Control, <i>R26^floxneoWnt4</i> heterozygote; mutant, <i>R26^floxneoWnt4; Col2a1-Cre</i>.