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प्रश्न
Explain the inheritance of sex-linked characters in human being.
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
find odd one from following: Typhoid, Haemophilia, Albinism, Colour blindness.
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Answer the following briefly:
Explain with the help of a chart what will be the colour of a child's hair if father has got dominant gene for black hair and mother has recessive gene for brown hair?
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Haemophilia is due to recessive gene on __________
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Linkage is a permanent feature of few genes.
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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.
Very Short Answer Question.
What are holandric traits?
Study the following statements and select the correct option.
Statement I: Holandric genes are present on Y chromosome. Statement II: Holandric genes are always inherited from father to son.
Identify the INCORRECT statement with regard to haemophilia.
Holandric genes are found only in ____________.
If a colour blind man marries a normal visioned woman, what is the percentage of offsprings showing colour blindness phenotypically?
Holandric genes are located ______.
