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With recessive gene mutations on the X chromosome,[link widoczny dla zalogowanych], and Huntington disease (a degenerative disease of the nervous system).
People who have a change in just one copy of a recessive gene are called "carriers." They don't usually have the disease because they have a normal gene copy of that pair that can do the job. When two carriers have a child together,[link widoczny dla zalogowanych] cheap nike shoes How to Name a Baby eHow_98,[link widoczny dla zalogowanych], the child has a 1 in 4 (25%) chance of getting a gene with a mutation from both parents,[link widoczny dla zalogowanych] Salida Hot Springs Salida, which would result in the child having the disease. (a lung disease), (a blood disorder),[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], and Tay-Sachs disease (which causes nervous system problems) are caused by recessive mutations from both parents coming together in a child.