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Cytic Fibrosis is caused by a recessive gene which means it will requre two copies of the same recessive gene for it to be expressed. Both parents musst therefore be carriers, or have the disease themselves.

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16y ago

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How can a child get cystic fibosis since it is a resessive gene?

Just because it is a resessive gene doesn't mean that a child cannot get CF. For example, let's do eyes. Say a mother had green eyes, and father had brown in my families case,I ended up with green eyes which is a resessive gene.


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a man


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An example of a gene is the BRCA1 gene, which is known for its role in hereditary breast and ovarian cancer. This gene provides instructions for making a protein that helps repair damaged DNA and maintain the stability of the cell's genetic material. Mutations in the BRCA1 gene can increase the risk of developing certain types of cancer.