Uploaded by judjanjua

Nondisjunction Disorders

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Name:
Name of Disorder
Down Syndrome
Chromosome affected
and how
The 21st chromosome is
affected. Instead of the
regular 2 copies that are
made theres going to be 3
copies.
Symptoms (as many as
you can list)
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Edwards Syndrome
Babies have an extra 18th
chromosome in all cells.
Theres 3 copies which
disrupts development.
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Flattened face
Small head
Short neck
Protruding tongue
Upward slanting
eye lids
Unusually shaped
or small ears
Poor muscle tone
Broad, short hands
with a single crease
in the palm
Relatively short
fingers and small
hands and feet
Excessive flexibility
Tiny white spots on
the colored part
(iris) of the eye
called Brushfield's
spots
Short height
How common is it?
Theres about 1 in every
700 babies born with down
syndrome. Each year
theres about 6,000 babies
born with down syndrome.
Microcephaly (small Theres about 1 in 5,000
and abnormally
babies born with Edwards
shaped head)
Syndrome.
Micrognathia
(abnormally small
jaw and mouth)
Long, overlapping
fingers and
underdeveloped
fingernails
Scrunched fists
Life Expectancy
People who have down
syndrome can live more
than 60 years.
A study shows that the life
expectancy can be from 3
days to 1 year for a baby
who has edwards
syndrome.
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Trisomy X
The chromosome that is
affected is the X
chromosome. Females
have three X
chromosomes instead of
there regular 2 X
chromosomes.
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Turners Syndrome
The chromosome that is
Low-set ears
Arched spine and
abnormally shaped
chest
Crossed legs
Umbilical hernia
Low birth weight
Delayed
development of
speech and
language skills, as
well as motor skills,
such as sitting up
and walking
Learning
disabilities, such as
difficulty with
reading (dyslexia),
understanding or
math
Behavioral
problems, such as
attention-deficit/hyp
eractivity disorder
(ADHD) or
symptoms of
autism spectrum
disorder
Psychological
problems, such as
anxiety and
depression
Problems with fine
and gross motor
skills, memory,
judgment and
information
processing
Before Birth
This syndrome affects
about 1 in 1,000 females.
The life expectancy for
someone who has trisomy
X is the same life
expectancy for someone
who doesn’t have trisomy
X.
It occurs in 1 of every
They can lead a normal life
affected is the X
Chromosome. There
should be two x
chromosomes instead of
only one X sex
chromosome.
Large fluid collection on
the back of the neck or
other abnormal fluid
collections (edema)
Heart abnormalities
Abnormal kidneys
After Birth
Wide or weblike neck
Low-set ears
Broad chest with widely
spaced nipples
High, narrow roof of the
mouth (palate)
Arms that turn outward
at the elbows
Fingernails and toenails
that are narrow and
turned upward
Swelling of the hands
and feet, especially at
birth
Slightly smaller than
average height at birth
Slowed growth
Cardiac defects
Low hairline at the back
of the head
Receding or small lower
jaw
Short fingers and toes
2,500 females that are
borned.
just like people who don’t
have turner syndrome.
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