If a normal woman marries a colourblind man, their
All sons will be colourblind and daughters normal
All daughters will be colourblind and sons normal
All children will be normal
All children will be colourblind
Haemophilia, a $X$-linked recessive disease is caused due to deficiency of
What is the cause of haemophilia
Sickle -cell anaemia has not been eliminated from the African population because it
Study the given pedigree chart and select the correct option of the given question.
$(1)$ Is the trait recessive of dominant ?
$(2)$ is the trait sex linked or autosomal ?
$A$ : The posssibility of a female becoming a haemophilic is extremely rare.
$R$ : Mother of such a female has to be carrier and father should be haemophilic