Paragraph 1
Scientists have solved an age-old
about cats. Geneticists in Japan have discovered why eight out of ten ginger cats are
. A professor found that a
in the X chromosome is
for a previously
"orange gene". The professor said: "Identifying the gene has been a
dream." Male
have an X and Y chromosome. If the male cat's X
has the gene, it will be a ginger. A female cat has two X chromosomes. The gene needs to be
in both for the cat to be orange. This is less
to happen.
