HUMAN GENETICS UNIT 6
HUMAN GENETICS
UNIT 6
HUMAN VARIATION
Genetic differences: each person has their own exclusive genotype
Environmental factors: can affect the genes expression. These effects are not inherited
QUANTITATIVE TRAITS
Skin colourWeightHeightEye colourHair colour
QUALITATIVE TRAITS
Cowlick twirling right/left
Freckles
Ability to roll the tongue
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.
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.
Bloodtyping Virtual Lab
HUMAN KARYOTYPE
DIAGNOSIS OF GENETIC DISEASES
HUMAN GENETIC DISORDERS
Cancer
Albinism Polydactyly
SEX LINKED DISORDERS
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?
INHERITANCE INFLUENCED BY SEX
Indicate the genotypes of the man and woman affected.
AUTOSOMAL DISORDERS
Down syndrome
Edwards syndrome
Patau syndrome
SEX CHROMOSOMES DISORDERS
Triple X syndrome
Turner syndrome
Klinefelter syndrome
XYY Syndrome
CHANGES IN CHROMOSOMES STRUCTURE