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प्रश्न
Explain the inheritance of sex-linked characters in human being.
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उत्तर
Haemophilia is commonly known as bleeder’s disease, which is more common in men than women. This hereditary disease was first reported by John Cotto in 1803. Haemophilia is caused by a recessive X-linked gene. A person with a recessive gene for haemophilia lacks a normal clotting substance (thromboplastin) in blood, hence minor injuries cause continuous bleeding, leading to death. The females are carriers of the disease and would transmit the disease to 50% of their sons even if the male parent is normal. Haemophilia follows the characteristic criss - cross pattern of inheritaitce.
संबंधित प्रश्न
Give technical terms for Repeated units of DNA molecule
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.
What does the child 1 indicate about this trait?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Haemophilia exhibits X linked inheritance.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Cancer is a genetic disorder.
What is criss-cross inheritance?
Why are sex linked recessive characters more common in the male human beings?
The criss-cross pattern of inheritance is observed in ____________.
Holandric genes are found only in ____________.
If a carrier woman marries a normal visioned man, what is the percentage possibility of sons being colourblind?
The disease colour blindness is a ______.
