DNAAF4 and dyslexia: Dyx1c1 is the first reported dyslexia candidate gene, and Dyx1c1−/− mice have become a good model for dyslexia research.[33, 34, 50, 61] In addition to dyslexia, Dyx1c1 deficiency is involved in various biological processes such as neuron migration[62] and cilia assembly.[63] In this study, we found that Dyx1c1 is widely expressed in the mouse cochlea, and we used CRISPR‐Cas9 technology to construct Dyx1c1−/− mice with severe hearing loss.