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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
the Biological/technical term for An alteration in the genetic material that can be inherited.
Briefly explain the term ‘Mutation’.
Give Reason:
Hemophilia shows criss-cross inheritance.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Haemophilia exhibits X linked inheritance.
Long answer type question.
Explain cris-cross inheritance with suitable example.
If a carrier woman marries a normal visioned man, what is the percentage possibility of sons being colourblind?
A normal man marries a female carrier for sickle cell anemia. What are the chances of having carrier children?
Holandric genes are located ______.
A plant with red flowers was crossed with another plant with yellow flowers. If F1 showed all flowers orange in colour, explain the inheritance.
