Human Disease through Heredity - PowerPoint PPT Presentation

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Human Disease through Heredity

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Human Disease through Heredity Huntington Disease Neurodegenerative Genetic Disorder that affects muscle coordination and some cognitive functions The disease is ... – PowerPoint PPT presentation

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Title: Human Disease through Heredity


1
Human Disease through Heredity
2
Huntington Disease
  • Neurodegenerative Genetic Disorder that affects
    muscle coordination and some cognitive functions
  • The disease is caused by a dominant mutation on
    the gene called huntington
  • Any child of an affected parent has a 50 chance
    of inheriting the disease. If both parents are
    afflicted the risk jumps dramatically

3
Cystic Fibrosis
  • Noted by difficulty breathing which results from
    frequent lung infections that can be treated
    though not cured.
  • Caused as a result of homozygous recessive gene
  • Unable to produce enzyme (protein) to break down
    mucus

4
Cystic Fibrosis Heredity
5
Sickle-cell Anemia
  • A genetic blood disorder characterized by red
    blood cells taking on an abnormal, rigid sickle
    shape
  • Individuals containing the homozygous recessive
    form of the gene will develop the disease.
    However, individuals heterozygous for the gene
    are resistant to malaria

6
Sickle-cell Anemia Heredity
7
Down Syndrome
  • Caused by the presences of all or part of the
    21st chromosome
  • Associated with impairment of cognitive ability
    and physical growth and a particular set of
    facial features

Karyotype set of photographs of chromosomes
grouped in order in pairs
8
Klinefelters Syndrome
  • Also known as XXY syndrome, A condition in which
    males have an extra X sex chromosome.

9
Turners Syndrome
  • A chromosomal abnormality in which a part or
    whole of a sex chromosome is missing.
    Characterized as having only one X chromosome
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