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
Expand the following biological abbreviations : DNA
Give technical terms for A sudden heritable change in the gene
Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is ____________.
Girl of normal vision whose father was colour blind marries a man of normal vision whose father was also colour blind. The sons of this marriage would be ______.
Identify the progeny produced if a colour blind male marries a normal vision female.
If a carrier woman marries a normal visioned man, what is the percentage possibility of sons being colourblind?
Which of the following is NOT an autosomal-linked recessive disease?
Holandric genes are located ______.
If the mother is normal and the father is haemophilic, then their two daughters will be ______.
