RK2. The head is abnormal, with one or both eyes being irregular in shape. The occipital region frequently has hairy tufts, often carried on protuberances. Males are very infertile and their viability is approximately 10% of wild-type.
Abnormal head with one or both eyes irregularly shaped, often drastically reduced in size. Occipital region frequently has hairy tufts, often carried on protuberances. Males highly infertile; viability about 10% wild type. RK2.