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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
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red flower variety of pea (RR) with white flower variety of pea (rr)
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Which of the following is CORRECT with respect to sex-linked genes?
Give examples of X-linked traits.
Holandric genes are located ______.
The disease colour blindness is a ______.
