Cancer is more common in males than females because females carry an extra copy of tumor-suppressor genes on the other X chromosome, finds researchers at the Dana-Farber Cancer Institute, from scanning genomes of more than 4,000 tumor samples, representing 21 different types of cancer.

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Cancer is more common in males than females because females carry an extra copy of tumor-suppressor genes on the other X chromosome, finds researchers at the Dana-Farber Cancer Institute, from scanning genomes of more than 4,000 tumor samples, representing 21 different types of cancer.