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fragile x is a genetic condition causing intellectual disability. It affects both males and females, but females usually have milder symptoms.

Fragile X syndrome can not be descibed as Dominant or recessive as carrier females may or may not display the fragile site or the associated mental retardation.

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cystic fibrosis is an inherited life-threatening disorder that damages the lungs and digestive system.

it is recessive

usually occurs in the white population

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Tay sachs is a rare, inherited disorder that destroys nerve cells in the brain and spinal cord.

it is autosomal recessive

can occur in infants

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hemophilia is a medical condition in which the ability of the blood to clot is severely reduced, causing the sufferer to bleed severely from even a slight injury.

hemophilia is a sex-linked recessive disorder.

affects more males than females

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PKU is a birth defect that causes an amino acid called phenylalanine to build up in the body. Untreated PKU can lead to brain damage, intellectual disabilities, behavioral symptoms, or seizures.

it is a rare disease

it is a recessive trait

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PKU patients discuss living with their disease

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As infants, Chase Herndon and Gordon Lester were diagnosed with phenylketonuria (PKU), a rare genetic disorder that causes an inability to break down the amino acid phenylalanine. Because phenylalanine is present in all forms of protein, PKU patients must follow a restricted diet extremely low in protein -- which can make everyday life a little more difficult than for the average person.

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sickle cell is a group of disorders that cause red blood cells to become misshapen and break down. As you can see the regular blood cell looks different compared to the one affected by sickle cell anemia.

it is recessive

more common in the African American community.

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Huntington's disease is an inherited condition in which nerve cells in the brain break down over time. you can see how the normal brain looks different than the Huntington disease brain.

usually starts to take place in a persons 30's or 40's.

there is no cure but treatment may help slow down its affects.

it is recessive.