6.human genetics
TRANSCRIPT
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HUMAN GENETICS
UNIT 6
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HUMAN VARIATION
Genetic differences: each person has their own exclusive genotype
Environmental factors: can affect the genes expression. These effects are not inherited
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QUANTITATIVE TRAITS
Skin colourWeightHeightEye colourHair colour
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QUALITATIVE TRAITS
Cowlick twirling right/left
Freckles
Ability to roll the tongue
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The ABO system establishes four blood groups (A, B, AB and O) according to the presence or absence of certain proteins, called A and B, in the membrane of the red blood cells.
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Depending on the proteins (A or B) in the red blood cells, there will or will not be anti-A or anti-B proteins, or antibodies, in the blood plasma.
Anti-A antibodies are capable of uniting with A proteins; and anti-B antibodies can unite with B proteins.
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Bloodtyping Virtual Lab
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HUMAN KARYOTYPE
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DIAGNOSIS OF GENETIC DISEASES
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HUMAN GENETIC DISORDERS
Cancer
Albinism Polydactyly
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SEX LINKED DISORDERS
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Indicate the genotype of a man affected with the anomaly. Indicate the genotypes of the women affected. (use X = normal chromosome; x = chromosome with the anomalous gene)
Is the anomalous gene dominant or recessive?
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INHERITANCE INFLUENCED BY SEX
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Indicate the genotypes of the man and woman affected.
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AUTOSOMAL DISORDERS
Down syndrome
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Edwards syndrome
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Patau syndrome
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SEX CHROMOSOMES DISORDERS
Triple X syndrome
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Turner syndrome
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Klinefelter syndrome
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XYY Syndrome
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CHANGES IN CHROMOSOMES STRUCTURE