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GENETIC DISORDERS.

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Presentation on theme: "GENETIC DISORDERS."— Presentation transcript:

1 GENETIC DISORDERS

2 DOMINANT AUTOSOMAL HEREDITY
A single dominant autosomal allele is inherited from one parent causing the person to show the dominant trait Huntington’s Disease- lethal genetic disorder caused by autosomal dominant allele. Degeneration of the nervous system in ages Passed to the offspring.

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4 RECESSIVE AUTOSOMAL HEREDITY
Most genetic disorders are caused by recessive genes

5 CYSTIC FIBROSIS White Americans Mucus in the lungs and digestive tract
The thick mucus collects in the lungs

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7 SICKLE CELL ANEMIA Most common in black and Mediterranean population
Red blood cells are sickle shaped Suffers from anemia and clogged blood vessels

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9 TAY SACHS DISEASE Absence of an enzyme that breaks down a lipid produced by the Central Nervous System Mental deterioration, die by age 4 Common in Ashkenazi Jewish population

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11 PHENYLKETONURIA (PKU)
Absence of an enzyme that converts phenylalanine to tyrosine Accumulates in the body Causes CNS damage & mental retardation Special Diet will prevent symptoms

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13 SEX LINKED DISORDERS Genes that are only carried on the sex chromosomes (X,Y) X-linked are passed to daughters & sons (generally females are only carriers) Y-linked are passed only to the sons

14 COLOR BLINDNESS Caused by the inheritance of 2 recessive alleles on the X chromosome Red-Green, Blue-Yellow, or Complete

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16 HEMOPHILIA X-linked disorder
Blood does not clot, missing a clotting factor

17 Queen Victoria England

18 ANEUPLOIDY Abnormal number of chromosomes
Down Syndrome- 3 chromosomes on the 21st pair Turner Syndrome- female with only one X chromosome Klinefelter’s- Male with XXY

19 Down Syndrome

20 Turner Syndrome

21 Klinefelter’s Syndrome

22 Some other genetic disorders!
Progeria Albinism

23 Dwarfism

24 Muscular Dystrophy

25 Retinoblastoma

26 Marfan Syndrome

27 Lesch Nyhan Syndrome

28 Shortest man: 21 in., tallest 8 ft 3 in


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