MCQ
The most striking example of point mutation is found in a disease called
  • A
    Night blindness
  • B
    Thalassemia
  • C
    Down's syndrome
  • Sickle-cell anaemia

Answer

Correct option: D.
Sickle-cell anaemia
d
(d)Sickle cell Anaemia is a hereditary disorder of autosomal nature which is caused by mutation of the gene controlling $\beta - $chain of haemoglobin.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The organism used for alcohol fermentation is
Pituitary gland is under the control of
Select the correct match
A. Multiload 375I. Pills
B. VasectomyII. Sterilisation
C. SaheliIII. IUD
Biofertilizers include
Assertion: The Malpighian corpuscle, PCT and DCT of the nephron are situated in the cortical region of the kidney.
Reason: In cortical nephrons, the loop of Henle is very long and runs deep into the medulla.
Which statements are incorrect for malaria ?
(i) Plasmodium vivax, P. malariae and P. falciparum are different species of Plasmodium which are responsible for different types of malaria.
(ii) Malignant malaria caused by P. vivax is the most serious one and can even be fatal.
(iii) Malaria parasite requires two hosts-human and mosquitoes-to complete its life cycle.
(iv) The female Culex mosquito is also usually acts as the vector.
(v) Infectious form of Plasmodium is gametocyte which enter in body of healthy person through the bite of infected female Anopheles mosquito.
(vi) The parasites initially multiply within the liver cells and then attack the red blood cells (RBCs) resulting in their rupture.
(vii) Haemozoin, which releases from ruptured RBCs is responsible for the chill and high fever recurring every three to four days.
A man suffering from diabetes mellitus drinks water more frequently, as he has to
In a test cross involving $F_1$ dihybrid flies, more parental­type offspring were produced than the recombinant­type offspring. This indicates
Presence of which of the following in urine indicates that person is suffering from diabetes mellitus
Select the correct sequence of transport of sperm cells in male reproductive system