Colourblindness is caused due to

A woman has a haemophilic son and three normal children. Her genotype and that of her husband with respect to this gene would be

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

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.

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

Describe Mendelian Disorder.