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प्रश्न
What is haemophilia?
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उत्तर
Haemophilia is an X-linked inherited disease in which the affected person is unable to synthesise a normal blood protein called Antihaemophilic globulin, which helps with clotting. Haemophilia is also called bleeder’s disease, as the haemophilic person bleeds for a long time even from a minor cut.
संबंधित प्रश्न
Give scientific reasons : Colour blindness is more common in men than in women.
Differentiate between character and trait.
Choose the correct answer:
Haemophilia is due to recessive gene on __________
A family consists of two parents and their five children and the pedigree chart shown below shows the inheritance of the trait colour blindness in them.

Name one other trait in humans which follows a similar pattern of inheritance.
A woman had normal vision, but her father was colourblind. She marries a man, who is colourblind.
Find out the probability of the first child being colourblind, whether it is a boy or girl.
Short Answer Question.
Observe the given pedigree chart and answer the following question.

Identify whether the trait is sex-linked or autosomal.
Short Answer Question.
Observe the given pedigree chart and answer the following question.

Give an example of a trait in human beings which shows such a pattern of inheritance.
What is cris-cross inheritance?
Explain the inheritance of sex-linked characters in human being.
Night blindness is classified as which type of inheritance pattern?
