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The top image shows a SCNT, IFNAR1 −/− ewe born in 2016 at 12.5 months of age. The bottom images show two 8-month-old IFNAR2 −/− sheep produced by breeding in 2021, a ewe (left) and a ram (right). All three IFNAR −/− sheep have abnormal wool, which looks more like the wool of a haired sheep, and horns, which are not normally present on Romney sheep. The IFNAR −/− sheep are indicated by blue arrows.
