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Give two examples in each case of (a) continuous, (b) discontinuous variation in human populations.
a) Continuous variation: for example, weight, height, intelligence, hair colour, skin colour, physique, blood pressure (any two).
b) Discontinuous variation: blood group, sex, eye colour (more or less), presence or absence of particular genetic diseases (e.g. albinism, haemophilia), free or attached ear lobes (any two).
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What is the MN blood system? What is the pattern of genetic inheritance of the MN blood system? A MN blood system is a third (in addition to the ABO and the Rh) system of blood
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