January 7, 2000
Cats and Humans Found to Have Similar Sex Chromosomes
Scientists at the National Cancer Institute have found that the sex chromosomes of cats and humans strongly resemble one another, despite an evolutionary divide of 90 million years between the species.
The mammalian X and Y chromosomes are thought to have emerged more than 250 million years ago, but the Y chromosome has shuffled its genetic material so extensively that many scientists believe that the order of its component genes differs even among closely
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