Sickle cell anaemia is due to

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 ?

Which of the following is not true of haemophilia?

Genes for colour blindness is carried by

$I.$ Abnormal development

$II.$ Father

$III.$ Mother

$IV.$ Autosomes

In the given pedigree, indicate whether the shaded symbols indicate dominant or recessive allele.