SCIENCE
GENETIC AND MENDELS LAW OF HEREDITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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0 percent
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25 percent
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50 percent
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100 percent
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Detailed explanation-1: -Thus, there are 50% of their children is likely to be colour-blind.
Detailed explanation-2: -So, the correct option is ‘Zero percent’.
Detailed explanation-3: -A man needs only one copy of a defective gene to be colour blind. A woman needs two copies of defective genes to be colour blind. So when a colour blind man marries a normal sight woman all of their sons will be normal but their daughters will be carriers.
Detailed explanation-4: -So, the correct answer is ‘50%’.
Detailed explanation-5: -If the father of a normal women is colour blind then she will be a carrier of the disease, since she will receive one X chromosome from both her parents and the X chromosome from the father will be diseased. If she now marries a normal man then there will be 50% chances of her sons being colourblind.