buy diflucan 200 mgcan i purchase diflucan over the counter cheap zyban online buy zyban canada cheap doxycycline hyclategeneric doxycycline for acne Each and every one of us inherits two copies of genes – one copy from our mother and one copy from our father. Most people are born with two normal copies of each gene. Hereditary cancer occurs when a person is born with changes or mutations in one copy of a damage-controlling gene which normally protects and fight cancer cells. People with an inherited gene change have a 50% chance of passing the mutation to each of their children. These changes may increase the risk for cancers in different parts of the body. However, these changes do not increase the risk for every type of cancer, and not everyone who is born with a gene change will develop cancer.
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