Sickle cell-anaemia disorder arises due to

  • A

    Duplication of a segment of $DNA$

  • B

    Substitution in a single base of $DNA$

  • C

    Deletion of a segment of $DNA$

  • D

    Duplication in a base pair of $RNA$

Similar Questions

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

  • [AIPMT 1990]

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?