What is the cause of haemophilia
Chromosomal aberration
Somatic mutation
$X$-linked mutation
All the above
Why is the frequency of red-green colour blindness is many times higher in males than that in the females ?
Carrier of genes of colour blindness are present in
Which of these is not a Mendelian disorder?
If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
If a colour blind lady marries a normal man, their children will be