Download Genetic Disorders

Biology B/ Pedigrees and Genetic Engineering
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Genetic disorder that affects a central portion
of the brain by causing the death of brain cells.
Early symptoms include mood swings,
memory loss, depression and twitching.
Late symptoms include involuntary spasms
and difficulty performing the most basic tasks
such as eating, walking and talking.
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Huntington’s Disease is the
result of a defect on the 4th
chromosome
This disease is autosomal
dominant, which means that
having the disease is the
dominant trait and the disease
shows complete dominance.
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Tay Sach’s Disease results from fatty
substances that build up in the body and
break down brain and nerve cells.
Symptoms do not appear for the first few
months of life, but children with Tay Sach’s
generally die by age 4 or 5.
Symptoms include: losing muscle strength,
not smiling or crawling, seizures, paralysis,
deafness and blindness.
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Tay Sach’s disease is the
result of an enzyme
that does not function
properly.
Tay Sach’s is a sexlinked recessive
disorder, which means
that having the disorder
is a recessive trait and
the allele is located on
the X chromosome.
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Genetic disorder that results in a very sticky
mucus coating the lungs, making them more
likely to become infected.
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Cystic Fibrosis is a autosomal recessive
disorder, which means that having the
disorder is a recessive trait and the allele is
found on a normal (non-sex) chromosome.
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Genetic disorder causing a
failure to produce
melanin, a pigment that
protects the skin and
eyes.
This means the person
lacks pigment in skin, hair
and eyes.
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This disorder is autosomal recessive, which
means having the disorder is a recessive trait
and the allele is found on a normal (non-sex)
chromosome.