If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
$0.25$
$1$
No chance
$0.5$
If a haemophilic man marries a woman carrier (heterozygous) for haemophilia, what would be the possibility that their daughter would be haemophilic
If a boy's father has haemophilia and his mother has one gene for haemophilia; what is the chance that the boy will inherit the disease
If a father and son are both defective in red-green colour vision, is it likely that the son inherited the trait from his father ? Comment.
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
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 $sons$)