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Scientists have unravelled a long-standing mystery about the [canine / feline] world. Geneticists from Kyushu University in Japan have discovered why eight out of ten ginger cats are male. Dr Hiroyuki Sasaki discovered that a [mutation / mutate] in the X chromosome is responsible for a [previous / previously] unknown "orange gene". Dr Sasaki said: "Identifying the [genetic / gene] has been a longtime dream, so it's a joy to have finally [crushed / cracked] it." The gene is responsible for pigmentation in the [skin / skins] of animals. Male [annals / mammals] have an X and Y chromosome. If the male cat's X chromosome has the gene, it will be [the / a] ginger. Because a female cat has two X chromosomes, the gene needs to be present [in / at] both for the cat to be orange. This is less [likely / likelihood] to happen.

Dr Sasaki and his colleagues' research has been published [on / in] the journal "Current Biology". In the study, researchers analysed the [NDA / DNA] of 18 cats. Ten of the cats had ginger [fur / furry] . The researchers found that all of the [ginger / gingerly] cats had a gene mutation called ARHGAP36. The non-ginger cats did not have [this / these] . Dr Sasaki said cat lovers associated fur colour with personality [treats / traits] . He wrote: "Many cat owners swear [up / by] the idea that different [coat / jacket] colours and patterns are linked with different personalities. There's no scientific evidence for this yet, but it's an intriguing idea, and [that / one] I'd love to explore further." He said ginger cats may share particular [behaving / behavioural] characteristics because most of them are male.