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Inheritance of Red-Green Colour Blindness

A woman with ...

Question

A woman with two genes, one for haemophilia and one for colour blindness on one of its X-chromosomes marries a normal man. The progeny will be

A

All sons haemophilic and colour blind

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B

50% haemophilic and colour blind sons and 50% normal sons

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C

All daughters haemophilic and colour blind

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D

50% haemophilic daughters and 50% colour blind daughters

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Solution

The correct option is B 50% haemophilic and colour blind sons and 50% normal sons
A woman with two genes, one for haemophilia and one for colour blindness on one of its X-chromosomes
marries a normal man. The progeny will be 50% haemophilic and colour blind sons and 50% normal sons.

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Q. A woman heterozygous for haemophilia marries a haemophilic man. Choose the correct options with the ratios of carrier daughter, haemophilic daughter, normal son and haemophilic son.

Q. A woman with two genes, one for haemophilia and one for colour blindness on one of its X-chromosomes marries a normal man. What percentage of sons will be normal and affected by both colourblindness & haemophilia?

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