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  4. A normal visioned man whose father was colour blind, marries a woman whose father was also colour blind. Their first child is a daughter. What are the chances of this child to be colour blind

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Q. A normal visioned man whose father was colour blind, marries a woman whose father was also colour blind. Their first child is a daughter. What are the chances of this child to be colour blind

AIPMTAIPMT 2012Principles of Inheritance and Variation

Solution:

In the given condition the chances of child to be colour-blind is zero percent. It can be understood by the given cross :

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