Which of the following abnormalities is due to autosomal dominant mutation?
Colour blindness
Thalassemia
Myotonic dystrophy
Haemophilia
One of the genes present exclusively on the $X$-chromosome in humans is concerned with
A man known to be victim of haemophilia marries a normal woman whose father was known to be a bleeder. Then it is expected that
Colour blindness is a disease usually affecting man but the factor for it is transmitted to the children always by woman. This is because particular factor is located on
A woman with two genes for haemophillia and one gene for colourblindness on one of the $X$ chromosomes marries a normal man. How will the progeny be
The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes. Draw your conclusion on the basis of the pedigree.