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Solution


Q.

Assertion: Meiosis takes place only in gametes.
Reason: To restore the total number of chromosomes in offspring.
1 Both assertion and reason are correct and reason is the correct explanation of assertion.  
2 Both assertion and reason are correct but reason is not the correct explanation of assertion.  
3 Assertion is true but Reason is false.  
4 Assertion is false but Reason is true.  

Ans.

(1)

Both the sperm and ovum have 23 pairs of chromosomes, so when the zygote is formed after their fusion it forms 46 chromosomes in the zygote, and hence the number of chromosomes is restored in the offspring. Thus, both assertion and reason are correct and reason is the correct explanation of the assertion.