Gene for colourblindness is located on
Homologous part of $X$-chromosome
Non-homologous part of $X$-chromosome
Homologous part of $Y$-chromosome
Non-homologous part of $Y$-chromosome
A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of $sons$)
Study the pedigree chart given below. What does it show?
Phenylketonuria is a genetic disorder due to a defect in metabolism of the following.
If a colour blind lady marries a normal man, their children will be
If a haemophilic man marries a woman carrier (heterozygous) for haemophilia, what would be the possibility that their daughter would be haemophilic