Complex sentence: The heritability of fear varies markedly in cattle from low (0.1) to high (0.53); such high variation is also found in pigs and sheep, probably due to differences in the methods used.
Split into simpler sentences: The heritability of fear varies in cattle from low (0.1) to high (0.53). Such high variation is also found in pigs and sheep, probably due to differences in the methods used.