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Genetic Disease Notes
Transcript of Genetic Disease Notes
human genetic disorders
passed down or inherited from parents to children
, or can be caused by
abnormalities in chromosomes
mess ups during Meiosis
so that, because of
may or may not
Why is this???
codes for a specific
may or may not, after
, have been
the gamete that created you
if the new baby is a
. These are called
sex linked diseases
. We will discuss them in more detail later in the unit.
Another way that
within a person is
pairs of homologous chromosomes don't separate during Meiosis I
. This process is called
. When this happens,
both members of the chromosome pair move to the same pole of the cell during Anaphase I.
This means there is an
extra chromosome in half of the gametes
one less chromosome in the other half of the gametes
once a cell has
One type of
Sickle Cell Anemia,
serious disease that is often
found in individuals
to either the
northern Mediterranean or to
. This disease is
Another type of
Down Syndrome (or trisomy 21),
. This type of genetic disease is caused by
21st homologous chromosome pair.
is another type of
that you may of heard of. This disease is
inherited from parents
and is a
. This disease causes people
to not be able to see certain colors.
some genetic diseases
detected at birth
, others may
not show up
late in adult life
Doctors can now take
in a process called an
From the DNA, a doctor can have a
picture of all the chromosomes in a cell
to see if the
will have a
. These pictures are called
deletion of a part
of a chromosome or loss of a chromosome, or an extra chromosome due to
Some other genetic diseases
Super Female (Triple X Syndrome)
Most African Americans can trace their ancestry to west central Africa. Malaria, a serious parasite disease that infects red blood cells, is common in this region of Africa. People who are heterozygous for the sickle cell allele are generally healthy and have the benefit of being resistant to malaria
is a disorder that
affects only males.
this disorder have an
extra X chromosome (XXY)
, giving them a total of
instead of the normal
, men with this syndrome often develop
more breast tissue
than normal, have a
less muscular body
grow very little facial or body hair
, may have
, and are
rare genetic disorder
of a person's
is a genetic disease
only affects women
, and is
caused by a missing or incomplete X chromosome.
growth and ovary development
. Girls with this disorder are
shorter than normal, have delayed puberty, and may have a short webbed neck.
Super Female Syndrome
is a genetic disease that
only affects women
caused by the presence of an extra ‘X’ chromosome
Women with Triple X Syndrome are normally
taller than normal, have an increased width between eyes, have proportionately smaller head size,
and may have
learning disabilities and poor motor skills.
of people with the syndrome
die during the fetal stage
infants who survive experience serious defects
live for short periods