Principle of Inheritance and VariationHard

Question

Given below is a highly simplified representation of the human sex chromosomes from a karyotype.
The genes a and could of

Options

A.colour blindness and body height
B.attached ear lobe and Rhesus blood group
C.haemophilia and red-green colour blindness
D.phenylketnuria and haemophilia

Solution

Genes a and b lie very close to each other. So, they are representing linked genes. e.g. genes of haemophilia and colour blindness show sex linked inheritance.

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