Question

Pick up the correct statements:

(a) Mitosis occurs in somatic cells and meiosis in germ cells.

(b) DNA replicates once in mitosis and twice in meiosis.

(c) Mitosis and meiosis occur both in sexually and asexually reproducing organisms.

• A. a only
• B. b only
• C. c only
• D. a and b only
• E. b and c only

Answer 1

The correct answer is (A):

Statement (a):

1. Mitosis occurs in the somatic cells as it is an equational division.
   
2. In mitosis, the daughter cell formed from the mother cell is similar and hence it occurs in all the somatic cells of the body.
   
3. Meiosis occurs in the germ cells as it is responsible for the formation of gametes.
   
4. During meiosis, the chromosome number is halved, which is required for the production of gametes.
   

Statement (b):

1. ​DNA replicates once during the S phase of the cell cycle.
   
2. This occurs once in both mitosis and meiosis and hence it does not occur twice in meiosis.
   

Statement (c):

1. Mitosis and meiosis occurs both in sexually reproducing organisms.
   
2. Meiosis does not occur in asexually reproducing organisms as there is no requirement for gamete formation.

Final Answer: The correct statement is statement (a) only.