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Diseases caused by
abnormal
chromosomes or by
defective genes
inherited from one
or both parents.
Segments of DNA
located on a
chromosome that
code for a specific
hereditary trait
Occur when 1 gene out of
30,000 to 40,000 genes in
the body has a harmful
mutation.
When a gene carries
incorrect instructions

Nerve cells use a brain chemical
called dopamine to help control
muscle movement. Parkinson's
disease occurs when the nerve
cells in the brain that make
dopamine are slowly destroyed.
Without dopamine, the nerve cells
in that part of the brain cannot
properly send messages. This leads
to the loss of muscle function.
Degeneration of brain cells
Blood disease in
which the body
produces
defective
hemoglobin.
Blood disease in
which the body
produces little or none of the
blood proteins necessary for
clotting.
Disease of the body’s mucous
glands. It primarily affects the
respiratory and digestive
systems of children and young
adults.
More than one gene
influences the onset of a
disease. Lifestyle behaviors
can contribute to a person’s
chance of developing a
complex disease
CVD’s such as stroke, high
blood pressure, heart attacks,
arteriosclerosis, type 2
diabetes and cancer are
examples of complex
diseases.
When a person inherits the wrong number of
chromosomes or an incomplete chromosome.
Humans normally have 23 chromosomes in each cell.
Most common chromosomal
disease in the U.S. is
Down Syndrome.
If the immune system
does not function
properly it can result in
an immune disorder.
Examples of immune
disorders are allergies,
asthma and AIDS.
When the immune
system attacks the
cells of the body
that the immune
system normally
protect.
Rheumatoid Arthritis is an
autoimmune diseases are in which the
immune system attacks the joints.
Multiple Sclerosis occurs when the
immune system attacks the fatty
insulation of nerves
in the brain and
spinal cord.