Advertisements
Advertisements
प्रश्न
Explain the inheritance of sex-linked characters in human being.
Advertisements
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
Briefly explain the term ‘Mutation’.
Give Reason:
Hemophilia shows criss-cross inheritance.
Name any one X-linked disease found in humans.
Short Answer Question.
Observe the given pedigree chart and answer the following question.
Identify whether the trait is sex-linked or autosomal.
A family has five daughters and expecting sixth child. The chance of its beings a son is
The genes present on non-homologous part of Y-chromosome are called ____________.
Which of the following is CORRECT with respect to sex-linked genes?
If the mother is normal and the father is haemophilic, then their two daughters will be ______.
