A husband and wife have normal vision but fathers of both of them were colour blind. Probability of

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4.Principles of Inheritance and Variation

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A husband and wife have normal vision but fathers of both of them were colour blind. Probability of their first daughter to be colour blind is

A

$25\%$

B

$50\%$

C

$75\%$

D

$0\%$

(AIPMT-1990)

Solution

(d) Probability of their first $(or any)$ daughter being colourblind is nil as the daughter of normal father can never be colourblind.

Standard 12

Biology

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