If a colourblind woman marries a normal visioned man, their sons will be
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a
all normal visioned
b
one half normal and one half colourblind
c
three fourth colourblind and one fourth normal
d
all colourblind
answer is D.
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Detailed Solution
Colourblind woman - XCXC Normal man - XYTheir offspring - XCX (carrier daughter), XCX (carrier daughter), XCY (colourblind son), XCY (colourblind son)Hence, all the daughters are carriers and all the sons are colourblind.