Sickle cell-anaemia disorder arises due to
Duplication of a segment of $DNA$
Substitution in a single base of $DNA$
Deletion of a segment of $DNA$
Duplication in a base pair of $RNA$
Explain thalassemia.
Pick out the correct statements.
$I.$ Haemophilia is a sex-linked recessive disease
$II.$ Down's syndrome is due to aneuploidy
$III.$ Phenylketonuria is an autosomal dominant gene disorder
$IV.$ Phenylketonuria is an autosomal recessive gene disorder
$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder
Which of the following is a genetic disease
Given below is a highly simplified representation of the human sex chromosomes from a karyotype. The gene $'a'$ and $'b'$ could be of
Which of these is not a Mendelian disorder?